67 GTO 400 WW Code

[jst8a5.0]

Geno is right. Pontiac mills with the caps in place and when they do that those caps fit that motor only. Otherwise it's a crap shoot to see if you can find others to somewhat fit then have the machining done.

And just go and get some edelbrocks unless your 670's have already been done. They may also be too much compression for iron heads and todays pump gas. With the e heads at least they are aluminum and can dissapate that heat so you are safe with those 72 cc chambers. I ran mine for years and wound up at 11.9 at 114 without really tuning it and in a non wieght reduced street car.