1968 Vette 427 390HP Head Volume (CC)

[Joseph M.]

Hello,

I'm in the process of having my original 1968 Corvette 427 390HP engine overhauled and I would like to know what is the cylinder head volume (CC) for my original oval port 3917215 casting heads with 2.06 intakes and 1.72 exhaust valves. Also, can you tell me if a Crane Roller Rocker (13750) will fit under the original chrome valve covers?

Thanks!

[Joe L.]

Re: 1968 Vette 427 390HP Head Volume (CC)

Joe-----

The specification for the combustion chamber volume is 101 cc, nominal.

[Michael M.]

Re: 1968 Vette 427 390HP Head Volume (CC)

I do not beleive roller rockers will fit under a stock valve cover. I had my L36 rebuilt with a hydraulic roller cam and roller rockers. My engine builder supplied some very nice chrome valve covers that appear stock (with the "crush" on the rear of left side valve cover) although slightly taller (nothing major). The valve covers also have drippers as well as the tabs on the outside for the stock wire loom attahcing points.