My question is I have a 1989 5.7 iroc 2.77 BW rear that has been swapped to the G92 3.27 rear. I see there are two proms for 89 5.7L. Should I have changed my prom? If so what will I gain and what will I lose by sticking with my standard prom.
16129303 5.7L 2.77 rear (my original prom in car)
16129307 5.7L 3.27 (g92) rear
16129303 5.7L 2.77 rear (my original prom in car)
16129307 5.7L 3.27 (g92) rear