leaf spring upgrades?

[NorthstarGMC]

I need to replace my leaf springs and also move a shock perch to accommodate the 9.5 GM 14 bolt 4.10 posi rear I just bought.

I've heard of running Jeep leafs, but has anyone done anything beefier? I'm afraid if I go with some Jeep leafs I'll have windup problems.

Suggestions and helpful information is appreciated. Thanks guys!

[Captainfab]

I would look into a set of later model GM truck springs. Either the 52" or 56" ones. I think if you go with anything other than original style springs, you may need to change the spring hangers on the frame. Not positive on that.

[NorthstarGMC]

Can I bolt up later model springs on the original perches? If so what years? Is there a guide around for this? I've been looking and can't find much on the GMC leaf rear end upgrades. I can have custom springs cut but there are plenty of parts trucks around. Just want to see what has been working for others.

[Captainfab]

If I remember correctly the '73 and newer springs are 2-1/2" wide and your original springs are 2 or 2-1/4" wide. So no the later model springs will not work with the original spring hangers. Plus I'mnot sure on the length of your original springs. Seems like they are shorter than 52"

Originally Posted by NorthstarGMC

Can I bolt up later model springs on the original perches? If so what years? Is there a guide around for this? I've been looking and can't find much on the GMC leaf rear end upgrades. I can have custom springs cut but there are plenty of parts trucks around. Just want to see what has been working for others.

[NorthstarGMC]

I might as well chop the frame down to a short box and notch it at the same time. Sounds like this isn't a swap where I can just bolt up something. I'll be pushing 400hp and want something that will hold up. Thanks for the help. I'll look into it more.