340 heads??

Here's what my Chrysler Corporation Part and casting numbers book says:

casting #3418915- 1970-71 360 open chamber 1.88, 1.6 (J,Z,O)

casting #3418915- 1970 340 T/A open chamber 2.02, 1.6 (O, U)

casting #3418915- 1971-72 340/360 open chamber 1.88, 1.6 (J)


Mine have the 3418915 casting#, 2.02 valves and have the (O), wouldn't that make them T/A heads, being that the only other 340 heads with the same casting# and an "O" has the 1.88 valves?
I'll check for the offset pushrod hole tomorrow.