N H R A rules state that the loop must be installed no more than 6 inches behind the front U-joint. If you don't mind more holes in the floor, it's a good idea to install one in the rear as well.
QUESTIONI have a '71 Firebird that sees a lot of street/strip action. It's got a hot 400ci V8 with a TH400 trans, 2500-stall converter and 3.73:1 rear gears. After cruising it for the past year or so, ...