I've had the same Prothane brand of poly mount in my cuda since 1997. Started out as a very mild 440 daily driver and now makes well over 1k hp.
Only trans case I hurt was when a stock clutch drum exploded in 2008...the entire trans case had to be swept up off the first 20 feet of the track.
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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