The springs are off a 90's dodge 1/2 ton truck. heres what he said. "my old runner i ran 90's 63" dodge half ton springs which have a offset center pin 2 or 3 " which allowed me to put the shorter end towards the rear and only relocate the rear spring hangar about 1 inch for the proper shackle angle which let me bob the runner more than with the chevies this type may be more of what you looking for to keep the back end short...."
Let me tell you this guy knows what he's talking about, He has a complete wall of rigs he's built from Zuki's to Yota's. So its another option other then the chevies.
But if you do that, then you have to move the front mount even further forward. I can see this being somewhat helpful if you're going to bob the bed, but a 63" spring is a 63" spring. You've got to make up the mounting difference somewhere. I'm not sure I would want my front spring hanger any farther forward than it is right now, but mabye thats just me
