Heads, what are these ?

MAPS said

Ok what I know is they have headers that are fitting on to 340 heads so this was one reason they ere thought to be 340.

@Locomotion
As for the pushrod work, you are dead on as they are not straight like the stock heads, there was extensive work done on the heads, I would assume by Mr Hamburger himself, as they are similar to the T/A head set up.

Thanks again guys.

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Interesting stuff. When I bought these originally the speed shop owner said they originally went for $3000. But when the W2's came out there wasn't a market for the Hamburger heads. He sold them to me for $1500. Fast forward 35 plus years, kids, houses, etc etc and here they are lol. Going back to a more stock setup for the street and passing on the bracket racing days.