Met mark. His **** blew up. Great guy and built a bad *** slant... but that's like me with a 426 aspiring to top fuel hp... lmfao.
"Keep dreaming nerds" is my 1st thought, but I was there once. No worries
Fwiw I get 195-205cfm int/145 exh cfm out of a slant head with 1.70/1.44 valves. I'm not trying for it all...but that's a decent amount of work.
Now put it perspective..That's like a ported 1.78/1.50 318 head ... now take 2 cylinders away...make the others tiny and choke it indiction/exh...wahala the 170 slant.