[quote=Eljaro;1131926]I think a very good book for the 351W engine you have is HPBooks How to Rebuild Small-Block Ford Engines Book By Tom Monroe.
Hi Andronikos, I was wondering if you ever got any feedback from your engine builder regarding the valvetrain failure. I agree with the others who advised you to rebuild the engine yourself and the book mentioned by Eljaro above is an excellent reference. Also, I have found a DVD called "Power Building Videos - Heads, Porting and Valve Trains" explains a lot of the valvetrain geometry issues and how to aet up a valvetrain properly. In addition it also has lots of other tips on cams, rocker arms, valve springs, etc that would come in very useful if you had not done this sort of thing before.
Don't be frightened of doing this stuff on your own. You need to educate yourself as much as possible beforehand and then take your time and make sure you have done everything step by step and remember to check your work several times over. The satisfaction from doing something like this yourself is enormous not to mention that you save considerably on assembly costs.
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Hope everything goes well for you and your engine and please post more videos on you tube when you have your cobra up and running again.
Prwxora xwris fovo
George H.