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Doubler project

J

Jacks'72K5

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According to the spec sheet, I have a NP 205 on my 72. I am running stock gearing. I have been running 35x15 boggers. I just mounted 39.5x15x16 STS. I have a good working NP 208 and the mechanical aptitude to make my own doubler. Is it worth it? Anybody done it? Any pointers?

Also I was talking with another guy about rear steer. Is it possible to put a front axel in the rear. Drawbacks, advantages? I have noticed that Toyota has one model that has an offset differential. Am I shooting in the dark here or is it possible?
 
Believe me......ANYTHING is possible.

All it takes is money and time.

The question to ask first is: WHY?



Most trucks work just fine without rear-steer. If you're jamming your truck into places tight enough to need it you probably should be building a buggy and not a full-size K5.

I've said it many times....when it comes to building a truck for wheeling, the first thing you need to do is pick the tire size you want to run. EVERYTHING else you buy for parts, gearing, etc. will be directly related to the tire size you chose.

Hang out, read some threads (we've got a couple hundred thousand of them) and don't buy any parts yet. Better to have a more detailed understanding about what's out there first than to start spending $$$ and realize you took the build in the wrong direction.


:usaflag:
 
Jacks'72K5 said:
According to the spec sheet, I have a NP 205 on my 72. I am running stock gearing. I have been running 35x15 boggers. I just mounted 39.5x15x16 STS. I have a good working NP 208 and the mechanical aptitude to make my own doubler. Is it worth it? Anybody done it? Any pointers?
Click to expand...


you don't need a doubler, you need 1 tons and proper axle gears before you start looking at a doubler imo....
 
ryoken said:
you don't need a doubler, you need 1 tons and proper axle gears before you start looking at a doubler imo....
Click to expand...

Ditto, a doubler is nice but for most folks, a luxury to be enjoyed once you finish the basics. I have a doubler and it was one of the last things I did once I finished everything else.
 
ryoken said:
you don't need a doubler, you need 1 tons and proper axle gears before you start looking at a doubler imo....
Click to expand...

Would if I could. Raisin' 5 kids, wife is a domestic engineer. I have an extra T-case, trans and Dana 44 front in the back yard, not 1 tons and lower gears. Inexpensive is the name of my game!
 
Well, if money is the issue, keep in mind you will be having your driveshafts re-done as the lengths will now be off and you may have to change your pinion angle in the rear which will involve either shimming it or if done properly, cutting off the mounts and welding them back on with the proper angles. You also have the issue up front with modifying your crossbrace. Most folks run both cross braces to fasten the T-cases to but since the front driveshaft will hit the front crossbrace, you will need to notch it and make it go over the top of the shaft. You want both T-cases supported so you either fab up a new custom crossbrace, or notch a stock one to make the front fit. Again, all these things cost money. As for using a front D44 in the rear, there are many reasons not to do it. I'd do a search on it, or drop a line to Jesse at High Angle Driveline and he will set you straight on it. A net search will also result in mucho info.
 
It may not cost you anything to build a doubler but IT WILL cost you money to keep repairing broken axles (of course unless you have a stock pile of them somewhere).
 
Thanks guys, I do have a torch, welder, and a pile of metal in the back yard. Fabing drivelines doesn't scare me either. I wasn't really planning on the front axel on the rear, I just wanted to know why to not do it for future discussion. I will work on the doubler this summer. Also planning on a 3/4 eliptical on the rear. Yes, I do have a pile of extra springs in the back yard.

I like the Q-jet discussions, I have one I run for wheelin' and an edelbrock 1406 I put on for the normal driving around. My Blazer is a trailer queen, however I live close enough to the school that my kids drive it everyday over a two track to school. The Q-jet has choke/start issues they don't understand.
My question here is, is the Q-jet a more suitable, buildable carb for an OHV, or is the Edelbrock? Currently the Q-jet gives me downhill slope problems, and the Edelbrock gives me up hill slope problems.
 
The thing about the doubler and higher axle gears is that the driveshafts and yokes get loaded up pretty hard in low low. I used to kill driveshafts and yokes all the time. Once I dropped to 5:13 gears, it all went away.

I'm with everybody else here. Build the truck and then think abouta doubler.

Also, I've seen many broken 208 based doublers in less powered and lighter rigs (jeeps)
 
Desert Rat said:
The Q-Jet has long been known as a good offroad carb with proper tuning. I have an Edelbrock Q-Jet on mine and it runs fine.
Click to expand...


I'm no professional (anymore) but I don't remember seeing any Q-jets with the Edelbrock on them. All the ones I have torn into (about 10-12 over the years) say built by Carter for GM on them. Are Carter and Edelbrock connected too?
 
Jacks'72K5 said:
I'm no professional (anymore) but I don't remember seeing any Q-jets with the Edelbrock on them. All the ones I have torn into (about 10-12 over the years) say built by Carter for GM on them. Are Carter and Edelbrock connected too?
Click to expand...

Edelbrock built it's own version of the quadrajet that you can still buy. I can't remember the specifics, but I think it was based off the bigger pontiac 850 version, could be wrong about that though.
 
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