I assume you are using a jump joint to go from the 3600's drive shaft to the firebird's axle? Thats a huge difference and you will want to align these closely.. sure you want that car axle in a 3/4 ton?

With the box not being on the truck you will want to make sure you have the axle closely centered from side to side.. else you get a tire rub on floor supports
good luck


1950 Chevy 3600


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