Go ahead and try- - - -it will add to your portfolio of experience that can only come from attempting the impossible. Sometimes you succeed- - - -sort of. Where did you find a Fenton-style header that's actually dimensioned for a GMC head? They're extremely scarce, and the ones made for a Chevy don't fit at all.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!