Got to do some work today on my 1967 GMC

[sduckworth13]

I'm doing a 5 lug disc/drum suspension swap on my 1967 GMC 3/4 ton with a 1974 Chevy 1/2 ton truck and I'm doing a 4/6 drop also. I got my 3.40 1974 Chevy 1/2 rearend set in today. I was told it would fit so that I didn't have to move my leaf spring perches. It truely does bolt right up to the leafs without any modifications to the perches. I do need to relocate the shock mounts on the rearend though. I cutoff my shock mounts on the rearend today. I don't have my flip kit yet, probably get it next week. Along with new gear oil, drum hardware, wheel cylinders and drum shoes for it. I have never did a flip kit before, should I wait to weld my shock mounts after I get my flip kit installed? Also I have seven leafs on my leaf spring pack, how many should I remove to achieve a 6 inch drop in the back or will just the flip kit alone drop it 6 inches?

[dmack91]

I am guessing your flip kit moves the springs under the axles? If so, it looks like you will get about 6" drop. Just measure the distance from the top of the spring pack to the bottom of the axle. That is how far it will be dropped when moved if the new perches are the same thickness.

Also, it looks like the bottom 3 leafs are overloads, so the only thing you would lose by removing them is their actual thickness since there is no arch effecting the main spring pack.

[sduckworth13]

Oh ok cool, thanks I'll measure that distance. If my combined height is less than 6'' should i remove a couple of leafs or do a lowering shackle?

[sduckworth13]

Just read the last part thanks for the help, missed it the first time. I was reading it on my blackberry.

[sduckworth13]

I guess I probably wouldn't want to take a leaf out if it was not more than 6 inches anyway. Long night.

[sduckworth13]

Lowered