304 head swap

[cjmike67]

Does anyone have any idea how much change in a compression ratio will you get on a 304 going from later style heads to the older closed chamber heads?? :-|

[cjmike67]

No body has any ideas? I think i should get a 1.0 increase to make it to 9.2 or so !

[jeepsr4ever]

I think we need to refer back to the head chart for this one, the only hang up are the small valves