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So in other words I'm better off running the 7.5 until it grenades and then picking up a bigger better rear. Is there any was to strengthen the 7.5? Also could you direct me to some information on an s10 axle swap?

I was looking at the bolt in gm 8.5 for a 76 monza on the website. What is the pricing on this unit? Does it require any modifications or parts outside of the factory car, such as a different, shorter driveshaft or different coil springs? Thank in advance!