Sorry for any confusions I’m creating. I may have been muddying my questions and intentions. I’m an enthusiast, more experienced than some, not most, but I’m driven to learn more.
This is what I’d like to know:
Is the head assembly that was used in the construction of the 428 PI, found in the 1968 GT500, unique from those head assemblies used on other 428 engines?
If so, how so?
I presume the C8AE-H head casting served as the basic building component. Beyond that, I make no presumptions.
Did the heads used on the 428 PI engine use the 2.09” & 1.65” valves or the 2.03” & 1.56” valves?
I’m re-reading Steve Christ’s book, How To Rebuild Your BIG-BLOCK FORD in case I over looked the info during a prior reading.
As a related aside, even though my efforts are to replicate a build, my efforts are focused on making it look period correct. I’m open to using new and improved components, i.e., positive oil seals vs umbrella oil seals, bronze guides vs cast iron guides, etc. I hope this helps you understand where I’m coming from.
Steve