I have my 402 down to the short block right now to put a new cam in it. I'm going with a Comp Cams Xtreme Energy CL11-250-3 and full Roller Rockers 1.7.
I was planning on installing a set of Brodix heads when I put it back together, but there was a problem and I can't do that right now. The guy I was getting them from had them checked and they had a crack between the cylinders...
My question is: What would result from me swapping my born with 396/402 L34 heads on to my block? I'd be going from 3993820 oval Port, Open Chamber 113cc heads @ 9:1 to 3964290 Oval Port, Closed Chamber 101cc heads that are ~10.5:1 from the factory.
I'm hoping to bump up the power. Would this work or would there be problems/interference/too much compression? I don't have the flow numbers, so I can't estimate what the compression would be.
Here's the pistons my 402 currently has:

I was planning on installing a set of Brodix heads when I put it back together, but there was a problem and I can't do that right now. The guy I was getting them from had them checked and they had a crack between the cylinders...
My question is: What would result from me swapping my born with 396/402 L34 heads on to my block? I'd be going from 3993820 oval Port, Open Chamber 113cc heads @ 9:1 to 3964290 Oval Port, Closed Chamber 101cc heads that are ~10.5:1 from the factory.
I'm hoping to bump up the power. Would this work or would there be problems/interference/too much compression? I don't have the flow numbers, so I can't estimate what the compression would be.
Here's the pistons my 402 currently has:
