340 heads

[dart67]

I'm looking at a 360 engine with 69 340 spec heads,never heard of these,what are these heads?
Thanks

 

[70aarcuda]

get the casting number off the heads....

that is the only way to tell which heads they are.

 

[1970Duster]

You can also check next to the spark plugs and tell us what letter is there ( like x, u, j, etc)