Originally Posted by martin7844
Hello. Fellow Hot Rodders. I have a 1969 Chev BBC with original Oval Port heads. Can I port-grind out enlarge the oval ports to match a rectangular port tunnel ram Intake, with two 650cfm carbs. I also want to install a Comp Cam 11-213-3 Magnum Hydraulic flat tappet camshaft with .550 " int./ .550 exh. lift, & 292 duration. Will this set up dramatically increase my HP & torgue. THX, Marty.
No need to try to turn the oval ports into rectangular ports- you can't anyway. Just run the intake on the heads, as-is- if you can't get the correct intake to match the heads. There have been reports that this combo works better than you would expect. Use rectangle port gaskets.