J-head to eddie swap?

I have a set of eddies when they first came out. I had them flowed before i ported them and they only flowed 227 @ 550 lift. At 600 lift they fell off big time. They say a stock x head flows 218. In stock form there will not much difference except comp ratio. The eddies need more comp to get the same power has a iron head. If you are building a street motor consider a set of magums they will work better on the street. Harry