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FireSale · 04-12-2019, 11:54 AM

Be careful with those NHRA Approved SS Heads. I bought the AFR 1399 heads for GT/MA on my Mustang 302 and found out that even though the casting was approved, the valve sizes shipped with the heads were larger than stock and thusly not legal for SS. Approved aftermarket heads must have stock sized valves. Verify this many times over with friends, racers using these heads and NHRA tech. Mine are going up on Craig's List.

Edelbroch says these heads take 2.11 and 1.66 intake and exhaust valves. If that matches your application, you are good. Still check..I'm the ford dude.

04-12-2019, 11:54 AM	#2
FireSale VIP Member Join Date: Feb 2014 Location: Lakewood Washington Posts: 1,407 Likes: 29 Liked 236 Times in 127 Posts	Re: Pontiac Cylinder Heads Be careful with those NHRA Approved SS Heads. I bought the AFR 1399 heads for GT/MA on my Mustang 302 and found out that even though the casting was approved, the valve sizes shipped with the heads were larger than stock and thusly not legal for SS. Approved aftermarket heads must have stock sized valves. Verify this many times over with friends, racers using these heads and NHRA tech. Mine are going up on Craig's List. Edelbroch says these heads take 2.11 and 1.66 intake and exhaust valves. If that matches your application, you are good. Still check..I'm the ford dude. __________________ Dale Shearon 68 Mustang 6394