318 head???

SGBARRACUDA said

64 AND 65 were the only ones with a different angle on the intake bolts. The later models will interchange with most SB intakes.

Click to expand...

This is correct. You can tell what heads you have by the intake bolt size. "64"-"65" use a 5/16 inch bolt and take a half inch socket. Normal LA heads, "66" and up use a 3/8 inch bolt and take a 9/16 socket. What are the last 3 casting numbers? Sounds like you should have a good combination.