318 head thoughts....

What I have noticed is that the 318 head is underrated and a decent head to inexpensively upgrade. I have gone into the low 13's with 360 valves only.
360 valve sizes are an excellent upgrade. Once you enter the word "Ported or porting" a head, the choice is the flow the current head can deliver vs. the flow and cost of a head all ready done for you.

The question is, can you upgrade your current heads cheaper than a set of EQ's RHS's, Edelbrocks, or another set of stock heads? You must figure in the purchase price of stock or Edelbrock heads and then then cost of work.

The RHS/EQ heads can be purchased from one of in house engine builders all done and ready to rock. As well as the other heads or yours if you send them to them.