Re: pro comp heads
While the castings themselves aren't terrible, the Pro Comp heads leave a little to be desired.
The valve guide material is junk. We have seen several sets ground away by the valve stems in just a few thousand miles. Also, seat machining isn't very consistent.
As a comparison, my 540 is equipped with a roller cam, flat top pistons and LS6 cast heads. H.P. is 704 on pump gas. The 69 Camaro, that I posted pictures of under the Chevrolet section, has a 540 with a similar roller cam, flat top pistons and Pro Comp heads. H.P. on pump gas is 738.
Also keep in mind, this customer had to pay the machine shop to replace all the guides and redo the seats. Not a bargain in the end.
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