Head Porting question

IMO a gasket match alone is kinda not worth it unless they are way off.

I recommend that if you do gasket match to leave it just a hair smaller then the gasket unless you are pinning the manifold/head/gasket to keep it stationary, oh and don't gasket match the intake manifold bigger than the head ports.

If you do decide to disassemble the 302's and gasket match you may as well
raise the roof .030 blending it to the bowl roof 'don't raise the roof above the valve at this level' and profile all the int guides long and skinny, I wouldn't touch the short turn 'just off the seat' area till you read up and or look at some detailed pictures of how to properly do it.

oh and I think it's something like for every 5cfm=10hp
good luck!