I have had good sevice from ATI and Fluidamper. I tried one BHJ damper on a fairly mild 500+ hp 440 and it slipped the outer ring after about 6 months of use. No more BHJ for me.
Only bad thing about ATI is you better spray it w/ clear coat before you put it on. Otherwise you'll barely be able to read the timing marks after a year or so.
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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