318 Port match heads to Performer RPM Intake

MOPAROFFICIAL said

You can lose compression, but not if they are the same chamber volume.
The 302 are 64cc. 360 heads range 70-72cc,X heads are around 69cc.

302 head ootb flows less than an open chamber 318 head and 273 closed chamber heads. They are just a chamber..and even that shrouds the ever living **** out of the valves. They need a ton of work.

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Yep the 302's are pretty damn close to the 273 heads. A good 273 replacement with hardened seats but no big hp gains. The induction hardened seats go away if you grind on them too much for bigger valves. A moot point with a 273 anyway with the small bore and valve shrouding. (and bore notching for the intake side) I wonder if the 1.50 exhaust would benefit much with a 1.60 and leave the intakes as is.