As long as you buy a good quality converter, you won't have any issues at all. I've been running a 9" 5,000 stall on the street since 2003 w/ no trouble at all. Never had a combo that could use an 8".


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax