318 head porting for the average joe

MOPAROFFICIAL said
Dont port 273/318 heads for a 360, use and port the 915 heads, 1.94/1.60 chevy valves work great for the lesser work approach to 250cfm.
If you've never ported anything, dont have a grandeurous expectation.

I've got a set of cracked magnum heads (Obviously)
I'll practice porting on them