Re: Double hump head?
Please correct me, if I am wrong, but I have heard they are about 62cc's unless they are plunge cut to unshroud the 2.02 intake valve. Then they are 64 cc.
I say "about", because you really don't know, unless you cc them. Decking or "truing" the surface can change the chamber size, and I have heard that the chamber can vary some in size also.
If you cc them, do all 8 of them !
What engine are you using these on ? They really don't breathe very well. They only have about 155 cc intake ports. They were designed primarily for 327's under 350 HP ! If you put them on a bigger engine... they need to be "ported" to the max !
If those heads need more than $250 work, you can buy much better heads. Even the vortec heads made for street 350's have a 170cc intake port, and will easily outflow the old camel backs.
69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1