not X heads and not J heads...what are they?

short run down. at a gas station in my Volare wagon yesterday and this guy comes over to ask about the engine because it "sounded awesome". I tell him stroked 340 and he says he has a 340. he said he thought it was a 72 model but some guys had come to look at buying it and passed because they said it was a 73 model with small valve heads?

I asked what he wanted for it and he said it had an Edelbrock cam and intake on it with a 904 still bolted to it. said he would take $400 for it and the tranny or he was into guns and would trade for a rifle or shotgun. said it ran great when he pulled it out of his truck!

at that point I asked if he was sure it was a 340, and he said yes.

so I go over today to look at it and I find a 69 model 340 complete from air cleaner to oil pan. I look expecting to see X heads and I see nothing but raised "squares" casted where the X or J should be.

I have never seen these castings. are they 318 heads or something?

it doesn't matter because I ended up trading him a .22 hornet rifle that I had $200 dollars in. traded him even for the motor and tranny.

I would like to know what heads they are if anyone has any info. thanks