Casting numbers on iron heads, what year?

[swebuick455]

I got a 455 from '76. Trying to figure out what year the heads are from. If they are pre '76 or not.

1243922 or 1248922. That's at least my take....

What do you think?

 

[Bob]

Shows here as 1248922 72-76, if they are '75 or '76, they are probably open chamber.

 

[LARRY70GS]

I posted a picture of open and closed chamber heads in your other thread. All you have to do is look at the chambers and then you'll know. Open Chamber 75-6 455 heads are good for boat anchors, that's about it.

 

[swebuick455]

I posted a picture of open and closed chamber heads in your other thread. All you have to do is look at the chambers and then you'll know. Open Chamber 75-6 455 heads are good for boat anchors, that's about it.

Thanks. Will do that!