Small Block Heads

Garth B said
Quick question
I neee to identify my Heads on a 72 340 block.

I’m familiar with j heads from another car.

These heads say “l”

What do I have? Thanks in advance everyone

Can we get a picture Garth?
I don’t remember an “I” casting, just the above X, O, U & Z letters. The letters were cast in on each side of the head and could be cut off a tad.