Do domed KYB 399’s interfere with 302 cast heads?

273 said

The 399 have a compression height of 1.81" and a dome height of 0.140"
The 167 have a compression height of 1.81"

9.60" - 6.123 - (3.31/2) = 1.821" - 1.81" = 0.012"

So if the deck height is 9.60" the 167 be 0.012" below and the 399 pad will be 0.128" above without any milling.

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This isn’t my question, I’m not worried about compression ratios this is all stuff I understand, I’m asking if the closed chamber 302 castings will hit the dome on the piston (or 920 casting like I want but cannot find.

Second question is where to get a proper 318 head gasket as most available are cut to be used on a 360 as well so with this massive combustion ring I’ll lose the compression gains icakeewehxjabezsbrhjsbhd