I just bought a pair of 351W heads from a guy, and I was told that they are 69 heads. The casting # is C9OE. The valves definitely look bigger that my E7 valves and the intake/exhaust ports look bigger as well. If I installed these heads on my 302 will I notice a big difference in power compared to my stock E7's? I'm thinking of having them ported before I install them, only because I paid $150 for the heads which I think is pretty cheap.
What cam do you guys recommend for these heads.
Also forgot to ask, I was told that I need to install hardened valve seats in these heads to be able to run unleaded fuel, is this true? What else would I need to do to these heads to get them ready?
What cam do you guys recommend for these heads.
Also forgot to ask, I was told that I need to install hardened valve seats in these heads to be able to run unleaded fuel, is this true? What else would I need to do to these heads to get them ready?