Making power out of the 318

I really like your thinking I was planning on buying a new transmission not a used one and it would be a built trans anyway so maybe I could find one with the lower gears but I will most likely be switching over to a eight and three-quarter rear end later down the road after this one shreds ,What if I use stock 318 heads and do a diy port job on them? Because I have those sitting in my garage. They’re the ones that came with the motor, but he also gave me those 360 heads. But if I was to stick with any of the heads, have to get completely redone because they have gunk and stuff like that so I would have to get new valves and all that stuff anyway but I just don’t know how much this machine work is going to cost I’m very new to the stuff. My dad hasn’t done this kind of stuff and 30+ years also
Ported 318 heads can make power but you basically come out with a head that flows around a stock or mild prep 360 head, might as well do the 360 ones if you can do it, could practice on the 318 ones.