i had a completely stock 8.8 in my heavy 89 'vert with SN95 axles sixty footing in the high 1.4s - low 1.5s all day long. the car ran 6.60s-6.80s for a few years without a hitch.

all my mustangs (6 or so) have had slicks & poweradders with stock rearends that never broke.