Are the e5 heads any good? Are they just as good as an e7? The reason I ask is I have a set of e7 but one is cracked but I can get an e5 pretty cheap. I'm just trying to get my car back together right now.
If you can get an E7 head to replace it, you would be much better off. It is a better head design and also, you do not want to run 2 separate heads on a motor. One could flow better than the other or generate more compression, and could damage the motor in long run.