Heads, what are these ?

Right, it's a 5 at the end.
So you are telling me these are 360 heads, not 340 ?
These are the heads that were on Ed Hamburger's car. Strange.
Then again I think he ran 360s also.
This is a picture of the heads.View attachment 1715603658
Thanks.
They could be 340, if they're 2.02...but 'usually' those heads were -A or -F at the end of the number. I'll also add that they were introduced the same year the 360 came out so production started in '70 I believe for the '71 release of the 360 and of course those castings were machine for 340s too.
Yours are the ta version , or it looks like ..