72 350 block
 

Are 72 350 bores chamfered for big valve 72 cc heads?

The 72 350 block I have in the garage is so I would say yes.

350 block
 

I"m removing both cyl. heads tomorrow, thanks.

I am using #12 big valve heads on a 72 350. The block has the chamfers. Just keep your lift reasonable, because big valves WILL hit the cylinder walls at a little over .500 lift. I measured .510, with basic fel-pro head gaskets.

Thanks.

I disassembled my 72 350 and it did have chamfers on both sides of each cylinder bore, thanks for the correct information.