bone, i seen one do that yrs ago in a 49 ford with a hi hp sbc. my buddy used those damn mr. gasket solid mountsa nd a rubber trans mount.what they came up with is that the mount let go on the tranny and since the motor was solid in there it couldnt move and the torque from the engine let the tranny try to twist. and bang. after they went back to poly mounts up front they never had another problem.this thing was pushin close to 600 hp.if that engine could have moved just a little (rubber) tyhe engine and trans would have moved togehtr instead of just the tranny trying to move all by itself.made sense to me.but i used to smoke alot of green stuff back then too! lol. i run a tci super streetfighter with a 3800 stall in our nova. love it. but ithought it was just a mite high priced, until i priced gettin a old 350 rebuilt with the right stuff.