building 8 3/4 489 section

j par said
According to my time slip 375 to the wheels and I don't think - I know it broke. Brand new from dr. Diff ring and pinion spool and bearings. set up by the most reputable rear end shop here in Portland. And I added that to get to the quick about the next two questions were they old gears and did I set them up myself.

Weight seems to kill 8 3/4 along with HP. I ran mine with 450HP and 3240 lbs for years and never had any issues, it went low-mid 7.20s with low 1.50 60'. The second pass it hooked with the 408 it broke the ring gear, couldn't stand 1.38 60'. There are guys running way faster and making them live, Thumper ran 9.70s with his and just went to a nodular housing so it can and is being done.

If I was running a low mid 7 second fairly heavy car I wouldn't hesitate to run another one.