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Old Iron Build ('79 K5 Cheyenne)

Overview Gallery Discussion
Shackle angle and a top veiw of the leaf spring so you can kind of figure out where stuff is





Also a bit of advice I have wheeled this setup for a while now. It has issues. The biggest one is frame flex at the upper shackle hanger. If it were even remotely possible I would but bracing around the mount. Box in that part. Add bracing on the outside just something to help with the frame flex.
 
blazinzuk said:
Shackle angle and a top veiw of the leaf spring so you can kind of figure out where stuff is





Also a bit of advice I have wheeled this setup for a while now. It has issues. The biggest one is frame flex at the upper shackle hanger. If it were even remotely possible I would but bracing around the mount. Box in that part. Add bracing on the outside just something to help with the frame flex.
Click to expand...

Thanks for the photos!
 
Got everything finished up. I ended up sliding the 10 bolt back under for now cause I don't have 8 lug rollers for the 60.

There are some issues. My shackle angle is **** on both sides. The drivers side is a little worse. I have about 1/4" clearance between drivers side shackle and the body mount. The passenger side has about 3/4" clearance between the shackle and body mount.

The passenger side sits about 3/4" - 1" higher than the drivers side. I wonder if its just the drivers side spring is maybe a little more saggy than the passenger.

Most likely course of action is I will relocate the B52 brackets forward and drill new holes in the frame. It is what it is, don't want to take any shortcuts on this.

Pinion angle is **** too. Not a big deal I guess, I'll run the 3 piece shims and I plan on running 1410 yokes on everything anyways.
 
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It might be more like 1/2" clearance on passenger side and like 1/8" clearance on drivers side. Either way I'm not pleased with either.

Would spring wear on the drivers side cause the shackle angle to be more extreme than the passenger side to include the added height on the passenger side? That's really what I'm trying to figure out. I have no problem moving the B52 brackets forward but want to make sure everything else is good too.
 
I've noticed that with the 52's that something as simple as turning the steering wheel will make the truck lean. That was with the old springs and the new springs I have now. With the 56's I'd imagine it's even worse.

Looks like moving your B52's forward is the simple solution as long as you're not pushing the axle too far forward. You may want to try and use a 6" shackle, that will help with the castor too.
 
Good! Hopefully thats the case! If so I'm fine with that, just dont want any underlying problems to surface in the future.

I have 6" shackles so I'll mock them up tomorrow or the next day to see how it works out.

I only have maybe 1.5"-2" of room to move the B52 bracket forward. I plan on doing crossover and hydro assist or full hydro. Leaning more towards crosover/hydro assist since it will see the highway.
 
Steering wheel or brackets?

I won't be working on the brackets until tomorrow or the next day.
 
Throwing in another option. Do you really have your heart set on the 64" rear springs? If not you could do 56" springs out back (just switch the shackle hangers side to side) and move your 52" springs from out back up front and run the B52 spring hangers where they are. You would lose the 4" offset that you were wanting up front but I think 2-3" is pretty much the max you can move forward if you are going to do crossover and high steer. If you leave it low steer you will be fine and there is also the full hydro option that you mentioned but I agree with you in doing hydro assist for streetability.
 
I'm pretty set on the 64s. Things could change but I really want to put them under there. I know I'll have to move the hangers and crossmember forward and the shackle flip will have to move further back on the frame.
 
Ok, well then you could still just go 52s up front. Just giving you an out if the 56s aren't a deal breaker like the 64s
 
I'm pretty set on the 56's and 64's. I'm trying to fit as much leaf spring under there as posible.
 
If all else fails I'll use 52's but I'm sure I'll be able to get everything in good working order.

I would have moved the brackets today but I was tired of messing with the truck all day.
 
So as someone who has wheeled with 56s I would just do the 52s. Biggest reason is there isn't that much difference.

So the solution of moving your front hanger forward is more than likely going to cause steering problems. My 56s have the center pin hole re drilled. So my axle should be like an inch further forward. This is less of a big deal with just crossover. But if your going high steer your gonna need to do some checking. I have high steer and if I went anymore forward my drag link and tie rod would cross up. Interfere with each other.

Now totally different ball of wax if you go full hydro.

I don't think the trouble of the 56s is worth it plus when fit comes time to replace them they are harder to find.

I will keep my 56s cause I have a couple of extra packs but I am switching to a slider instead of a shackle and trying to find a leaf from another pack with loose clamps on them to keep the leafs from walking side to side
 
Well hell. I just looked at everything again and noticed that if I move the B52 bracket forward anymore than it is I won't beable to bolt up the core suport body mounts... so that would be more issues right there.

I guees I'll give the 52's a try. I really don't want to relocate the shackle hanger though. I've noticed that a lot of people tend to relocate it when they do the 52" springs up front. I'm trying to figure out why. It seems like the adjustability that comes with the B52 brackets and using a longer shackle would be just fine.

It looks to me that using the 52" springs would clear my whole situation up and I don't think I would need to relocate the shackle hanger.
 
I didn't relocate my FUSH any and I think the shackle angle I have is acceptable. The angle would be a little better if I dropped back to the second hole from the front on my A-bomb bumper but I like having the axle forward the extra inch more than the extra shackle angle. I have plenty of bump travel and droop as is so what is there really to gain?

Anyway, you should be fine with the B52s, they have twice the adjustability as the A-bomb bumper.
 
I'll mocl it up with the shackle hanger in the stock hole. I'm trying to keep the tires out of the firewall so I may need to move it anyway.
 
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