Well, it's my turn to ask for suggestions..

I'm thinking old school 260-H Comp "High Energy" grind.( roughly 212@ .050,110-112 l/c, .440 wish lift. Seen one in a rebuilt 360 Cordoba,with smog equipment. Laid rubber ,everywhere..

Back to basics: Check the balancer for slippage/wrong one, fuel delivery & pressure/ possible tired valve springs( dump the damn rotators...)