pulling heads

im not saying it was prefessionally rebuilt, but it seems to have been done well. although they put a 727 flexplate in with the 904 transmission. i just dont like how i know nothing about the internals of the engine.

there really is no reason for me to pull the heads other than to gain knowledge of my project. if there are ways of me to get information without pulling them, then by all means ill do that instead. i just makes me nervous running it knowing nothing about the built engine.