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Rod Greene · 12-15-2008, 07:22 PM

When NHRA poured heads for SS They didn't take into account different valves. On my 72 340 stock heads with flat valves the cc's are bigger than spec with the tulip valve they are smaller. I talked with Bruce about this a few years ago. I would have to fill a stock port to make them meet the spec. I have 20 sets of stock unmolested 340 heads

12-15-2008, 07:22 PM	#5
Rod Greene Senior Member Join Date: Mar 2002 Location: TN Posts: 530 Likes: 436 Liked 242 Times in 81 Posts	Re: Cylinder Head Runner Volumes When NHRA poured heads for SS They didn't take into account different valves. On my 72 340 stock heads with flat valves the cc's are bigger than spec with the tulip valve they are smaller. I talked with Bruce about this a few years ago. I would have to fill a stock port to make them meet the spec. I have 20 sets of stock unmolested 340 heads __________________ Rod Greene Real men shift for them selves. Slowly working on TA Challenger for D,E/S and a 72 Challenger for SS/K, L as if I don't have enough other projects.