Thanks for backing me on that one Glen. I'm running an 82 22r block with a 78 20r head , 22r valvles aluminum rocker assembly and the dual row timing. There is no better way to make one of these motors perform on a budget. 
man i love me a hybrid
i ran one for a long time till i dropped a exhaust valve at about 7000 rpm
when i had to bore the block the 20R head wouldnt stay sealed so i put a ported 22R head on
