Assuming both ran 3.45 stroke with a 1.09 pin height the rod ratio on 8.7 would be 1.71 vs 1.56 for 8.2 deck..... I would use a deeper piston if i had an 8.7 meaning the ratio would be about the same doing this. The 8.2 still has lighter internals and the intake has shorter/more straight runners.
If I was to run an 8.2 use 2.75 mains with 1/2 inch studs all 4 bolt caps.
If I was to run an 8.2 use 2.75 mains with 1/2 inch studs all 4 bolt caps.
