1969 396 427 heads 3931063
 

For sale 3 pair 3931063 cyl heads for 396 325hp 350hp & 427 335hp 385hp
390hp 400hp engines. Dated K-13-8 pr, B-17,20-9 D-22,29-9 $350.00 pr plus
shipping or can deliver to MCACN contact Jerry PM or [email protected]

Re: 1969 396 427 heads 3931063
 

I think these may have been Chevys first attempt at a slight "open chamber" design -- but were still called "closed chamber" ...