Mr.Olds48, I always enjoy your replies... thanks bud. I will probably have better luck scoring the girdles for a BBC. It has Crane/Mildonin rockers all w/ poly's. I haven't known the difference in the past to know better. I will warm it up good on the adjustment so I don't break another. I am amazed how one poly giving up tolerance can make it run so crappy in the low!! It is night & day....