Good points by all.
I am really interested to see a good untouched example today of what Aluminum parts originally looked like,Block,Heads,intake,Trans.(albeit 35 years or so after those days)
I like that Ebay M22 main case as an example.
Crash,if you have some original examples as well,can you please post some pictures here for us all to View?
I,& a few here could help you post them if possible.