Roger Why not just run the sr on the street. I ran an UD sr on the street with those heads? 267/267- .426/.426 lobe with 1.65 rockers. .702 lift.I run lifter restricters but with a .062 oil hole for more top end oiling never a problem. I dont post much to many on that know it all. Dont need the aggrivation. I was running into the nines with a Pontiac back in the early eighties when not many were. Ill help you if you need anything else let me know. You can email me direct if you need me Ill see it quicker
scott1@losch.net