This "D port" normal tin gasket kit fits Pontiac V8 from 1967-79.
This is for normal 99% of everybody with 326, 350 389, 400, 455 PONTIAC V8's.. except for a few special ROUND port early 70s performance heads.. but ROUND port you can tell.. its ROUND. not "D" in its shape...
Always use a exhaust gasket compound or silastic sealer with these.
Each set has open center square or "D" shaped ports that measure 1.53 in. x 2.00 in. -
Ordinarily.. this is the set you'd need.....