I would like to believe the letters / numbers after the 428PI engine code specified the Shelby 428 only engine parts. So far documenting that is something that I have found no evidence for. Ford was a very process driven organization then. I expect there is documentation, it just needs to be found.
Bob,
Full size cars - i.e. Police cars - did not use the same oil pan as FE's that were going into either midsize or pony cars.
Looks great - One question I have always meant to ask Pete.
The PI cylinder heads are drilled for 8 bolt holes on the exhaust so they would not work on a Shelby 428. Also, the oil pan needed for the Mustang installation is not the same as the oil pan used for the Shelby. How did those parts get installed when the engine ID was the same as a 428 PI engine?
What do you think was different about the oil pan that was installed from Ford on the PI engine and the one you think was used on the Shelby?
Ok I thought you were inferring that AO Smith changed the oil pan. Sorry I assumed that you were aware that the engine code specifically designated how the engine was built.
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