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What is the best stock head to get for a SBF?

14K views 5 replies 6 participants last post by  tonys10sec306 
I had a set of home ported D5AE 351w castings that went 215 CFM @ .600 lift on the intake and IIRC, 188 on the exh at .600.

Went like stink on my old Mustang. Miss the car & the motor.

The D5s are identical to the C9's except the water ports are slightly different and the valves are smaller. Put you some 1.94/1.50's in there and clean up the ports a little and you'll have a "decent" set of iron heads. Still don't compare to aftermarket stuff, but not bad for Production Ford heads. I believe in '77 (D7 heads) they went to larger chambers and smaller ports. Same as the 302 heads from there on, from what I've seen. They're all junk compared to what you can get from the aftermarket though.
 
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