I just did what your about to. Built a pump gas 511 with 11.24:1 compression and it will run on pump gas with no signs of detonation using the MW victor head cnc'd buy Hughes engines. Solid flat tappet with 270*@50 ans .644" on intake on a 110. Uses a 1150 Dominator thats as dosile as a street 600 holley. I cant say it falls on its face with these heads and cam by any means.
