Suggestions on performance upgrades for 225

273 said
So a 200 cfm V8 port is said to have a 400 hp potential .

Now consider SR heads for a 440 flow 290cfm.

I honestly love the 440 in an A body. I've had /6, 340 and two 440's. The 440's fit fine and in some ways better. You can put a really mild engine together and have gobs of power and depending on the setup, decent mileage too.