I also have 351W heads on my 302. The heads are 72's the block is 69. I used Edelbrock stepped washers with 7/16 bolts & 351 intake gaskets. I also had the heads drilled and tapped for screw in studs and had Chevy 1.94" and 1.60" valves and hardened seats installed.
[This message has been edited by Scooter (edited 05-02-99).]