I just pickup a 77 blazer/buggie project. Its got 57" springs in the rear and 54" springs in the front. Is it worth the time and what not to go to the 63-64" springs in the rear? Will be going to 4 link down the road. Been fixing all the odds and ends that i just didnt like on it. And while in is apart i was kicking the idea of the long rear springs around. So im looking for any input that yall are willing to share.