I've just taken possesion of my 63 1/2 Z code, 4 speed Galaxie, and I noticed the motor has C3AE heads. I assume these are the standard heads for a 63 390. Are these heads any good for a performance street motor? The motor has a 6V intake set up, and I have a set of the 390/406 hipo exhaust manifolds. Would it be worth spending some money on these heads to fit 2.09/1.65 valves and have them ported? Are they the heads with the 2.34" tall intake ports?
