CK5
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1991 Chevy Crew Cab "R" / "V" Conversion

Ok, so a few updates seeing as I have been slacking. I logged about 1000mi on the Cummins and it had a slight "tick" that I was sure was just the valves. I started to diagnose the tick and never could figure it out, so.... I talked to a friend and got a good deal on having the engine rebuilt and getting some machine work done on it. While it was off getting work done I had them do the "everyday driver" head studs, install the 3200 gov spring and add slightly larger injectors.

I got the engine back, reinstalled it and have been enjoying it for the last 1500mi. The gov spring made a huge difference on the drive-ability of it and now that I have started to tune the AFC it is really waking up the truck. I also ordered up the hydro assist kit from Redneck Ram, I am in the process of installing it currently. Then one day while hanging out at a buddy's house I did this.....
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If you cant tell, that is a 46" Goodyear.... I have been thinking about the 395's for a little while because they are a little more than half the price of the current 335's I have now. I borrowed the tire to do some test fitting to see how much work it would take to fit them.
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Never-mind the miss-matched flip-flops on my youngest, he was upset that the tire was as tall as him! He soon got over it when he realized that it would make my truck taller. Here is what it looked like mocked up in the wheel well, the tires are not perfectly straight ahead so it makes it look a little weird but you get the idea.
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After some measuring and soul searching I have decided to make them fit. Currently I have about 4.5" of lift with the axle moved forward slightly, and seeing that I don't want a huge lift (relatively speaking), I think I can make them fit with 7". So a order was placed with ORD for some custom springs and they should be here in about a month. I plan on limiting the up-travel some in the interest of keeping it low and maintaining my inner wheel wells. This is not a crawler, more of a pseudo expedition (back roads camping) truck. The next order of business was stopping the big-a$$ tires, I have been looking at a big brake kit for the GM D60 for a while and this gave me a excuse to get it. It is the Torq Axle caliper bracket kit, it allows me to run 2009 and newer Ram 3500 front brakes. The rotor dia is a little over 14" and it has large dual piston calipers. This kit coupled with the Chevy AAM 10.5 axle I have ready to go in should stop the heavy pig!
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I have also been (slowly) working on sectioning a set of fenders for the truck, looks like I may need to speed up that process along with building some slider style steps.
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Damn this thing is a sweet ass truck! Those new tires can't be light! What are you going to do for rims?
 
My brother has those 46" military tires on his semi/crawler hauler. He used a whole bunch of airsoft bb's in each tire to balance them. It goes 70 mph down the freeway with little to no vibs from the tires.

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Damn this thing is a sweet ass truck! Those new tires can't be light! What are you going to do for rims?

IIRC they are a 20" rim...so he should be able to pick up any 20" rim in a 8x6.5 bolt pattern he wants and toss those tires on them. The goodyear 46's are really heavy, but the Michelin 46" military tires are even heavier. My brothers spare for his semi is one of the Michelin's and lets just say if you let that tire get away from you, it will surely kill a bus full of nuns
 
Damn this thing is a sweet ass truck! Those new tires can't be light! What are you going to do for rims?

So my current tires are Michelin XLZ in 335/80R20 (42ish) I plan on reusing my current wheels with the 46's. Right now, with the steel wheel and run flat, the 46 weighs about 450lbs...

My brother has those 46" military tires on his semi/crawler hauler. He used a whole bunch of airsoft bb's in each tire to balance them. It goes 70 mph down the freeway with little to no vibs from the tires.


I used the airsoft bb's on my current tires and they work great! I have had them up to 85mph with very little vibrations.
 
Was able to get started on the first steps of getting the 46's on. I got the hydro assist steering installed a few weeks ago and yesterday I started installing the ORD custom leaf springs. I am going from a set of 56" rear springs with a 1" zero rate and some degree shims, all together it netted me about 4.5" of lift. The ORD springs were built to have 7" of lift, the still required degree shims but I was able to loose the zero rate.

Here is the new vs old springs.
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New spring at drop with axle hanging from it.
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And here at ride height.
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This is how it is sitting now with the 42's and 7" of lift. I plan on mocking up the 46's this weekend but until my big brake kit arrives I won't be doing much more...
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Finished installing the springs and everything today... The old leaf springs had a significant lean to the passenger side. The driver side was about 1" higher then the passenger, the new springs cures that! It looks pretty good with the 42's but I really like the look of the 46's! Haven't put any miles on the springs yet as I had to get to work but I'm excited to see how they ride.

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And now for the 46 with the 7"lift!
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The goodyear 395's are the newest version on the surplus market, good reputation. FYI, they are speed rated to only 65mph.
 
The goodyear 395's are the newest version on the surplus market, good reputation. FYI, they are speed rated to only 65mph.

Yeah, I like the tread pattern of the Michelin but I think the Goodyear will work better. They are a little lighter, newer (like you mentioned) and the speed rating on the Michelin is like 55mph...
 
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So.... This thing has started to snowball...

Was driving to check out a welding project for a buddy of mine and when I parked I noticed a significant lean. I got out and was checking the front springs because the were the most recent upgrade, but as it turns out, my passenger rear tire had a sidewall failure. After some price checking and soul searching I decided that now was the time to attempt the 395's. I did some checking around and found some 70-80% Goodyear MTV's for a good price so I picked them up. Then my brother, who works for a Firestone Service Center helped me get them mounted on my wheels. That was a pain in the a$$... I got the tires mounted up and had to use some wheel spacer to clear everything, once I get better clearance on the fenders and inner fender I want to get away from the spacers.


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I had clearance the bottom of the bumper to even be able to turn lock to lock, even then I am going to have to clearance the core support, inner fender and the firewall... I plan to move the front axle back about 1" because I can remove more material easier from the firewall. I plan to still clearance the core support some how and also limiting the up-travel. Here are some pics of the clearances as it sits now..

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For the rear I plan on a ORD shackle flip to help with clearance on compression, I think the 2.5" one to try and bring the truck back to level. I hope during the week of Christmas, along with fender trimming, I can also get the new "big" brake kit and my AAM10.5 installed.
 
I do like the box you have on the back. Can you put a full sheet of plywood in there width wise?
 
Holy crap! Those are HUGE! Pretty sure MAW says you need Rockwells next.

We will see how the 1tons hold up, I have been looking into other options thought. Current attractive options include 5ton rockwells, Axletech 4000's, and Dana110. Just have to see how everything works out..

Snowball started a loooong time ago for you buddy lol

Sooo true.!!!... lol

The 5 ton Rockwells. 395's on the deuce and a halfs cause problems but the 5 ton axles have no complaints and they were available with hydraulic brakes or air.

My big concern with Rockwells is clearance for the 3rd member. I am "trying" to keep the truck relatively low and the top loader design may interfere with my crossmember. I will have to do some checking because I had not given rocks much thought until recently when this got out-of-hand.

I do like the box you have on the back. Can you put a full sheet of plywood in there width wise?

Yes and no. The box, without the generator and compressor that normally come inside has a main compartment size of 94.25"x50.25". Ply wood sheets do fit but you cant lay them flat on the floor, one end or the other has to be elevated.
 
What about a Super 60 and Dana s135 from an '05 and newer F550? They are pretty beefy. Or some 4x4 topkick axles.
 
What about a Super 60 and Dana s135 from an '05 and newer F550? They are pretty beefy. Or some 4x4 topkick axles.

Yeah the Dana s135 was the one I was talking about but for some reason I had "spicer110" on my mind. They are similar axles and I am really interested in the F550 rear axle but not so much on the front Super60. I just don't want to give up king pins for ball joints and all of the other things. If things go that far it might be easier to swap the body over to a F550 chassis. I feel like with my intended purpose that if i trussed the front axle it would hold up because its not constantly engaged. The rear axle however will see the majority of the workload so my short term plan is to swap in my AAM10.5 that has 4.56's and see how that ratio works. If its just not enough then I will start searching for a D135 with 4.88's or 5.13's and plan that swap.... Like I said, Snowball.....

The topkick axle are a cool idea but I think they would be hard to find and expensive....
 
My big concern with Rockwells is clearance for the 3rd member. I am "trying" to keep the truck relatively low and the top loader design may interfere with my crossmember. I will have to do some checking because I had not given rocks much thought until recently when this got out-of-hand.

What is your overall lift again with the new springs you just put on? My brother has 2.5 ton rockwells under his 88 Blazer (it's a truggy now and the front end is all tubed out...but still, has factory frame and still with leafs), and IIRC he has only a total of 6-7" of lift in the front and the top loader clears the cross-member. Granted, he did move his front axle forward a few inches and installed an ORD high clearance cross-member too.
 
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