I know of guys using 0-20 or even 0-10 in the engines,, but was thinking for the rear...Why not ?The car is for drag race only. I'm planning on a swap from 3.73 with sure grip to 4.30 set up that I have with a spool in a low H.P.(300) car. When I go to buy new rear tires.Plan on 27.5'' from the 26'' I have now.