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dave666693 · 11-25-2016, 08:46 PM

I have a 1971 GMC 4x4 3/4 ton on leaf springs. This is mainly a farm truck. I haul 2 yards of gravel at a time and need options on beefing up the rear suspension. In the old days you could take your leaf springs to a shop and have leafs added. Is that still the case?
Should I get a modern overload spring kit, air bags or just look for some 1 ton springs and swap them out?
Thanks in advance for any help!

Also considering a narrow dually rear end. Is that an easy swap?

11-25-2016, 08:46 PM	#1
dave666693 Registered User Join Date: Jul 2005 Location: Edgewood, WA Posts: 901	Heavy loads help I have a 1971 GMC 4x4 3/4 ton on leaf springs. This is mainly a farm truck. I haul 2 yards of gravel at a time and need options on beefing up the rear suspension. In the old days you could take your leaf springs to a shop and have leafs added. Is that still the case? Should I get a modern overload spring kit, air bags or just look for some 1 ton springs and swap them out? Thanks in advance for any help! Also considering a narrow dually rear end. Is that an easy swap? __________________ 67 C20/ 68 C10 stepside/inline 250--current project 71 GMC 4x4 70 Blazer project-Zombie assault vehicle 67 4x4 Burb