If the balancer isn't messed up now it probably will be after a few outings. I put one of those on a s.b. mopar, and in a month the mark was about 90* off. I put an ATI balancer and no more problem. I would only use an ATI, but for reference in case someone drags one in here, who's grenade of a damper does that? I had a BHJ damper on a 440 years ago that slipped the outer ring about an inch. Took it off and sent it back to BHJ...they fixed/replaced it but no one there would talk to me afterwards about an explanation. Been using ATI dampers since, w/ the exception of one Fluidamper that has also been a good piece.
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
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