Small Block Heads

harrisonm said

So a "U" head is a T/A head! Thanks. I admit I have never worked with or even touched a T/A head. Is the only difference between an X head and a T/A head the valve guide angles. Like I said, I've never really messed with them.

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No not necessarily, the T/A heads were also J heads. The letters don't mean much as far as I can tell, if someone has an answer that would be great but like I said they could be any letters or combination of letters. Here are a couple T/A heads that are J's top and bottom.