Ultradyne made some good stuff. They went out of business and one guy went to Lunati and the other went to Bullet cams. Harold Brookshire and Tim Goolsby are the two fellas I'm referring to, just can't remember which went where.

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