I made the head change at the same time I put the motor in the charger so my results may be tainted as it is much lighter than my old car.

That being said, I put on OOTB eddy heads and noticed a real difference in the motor right at the start of the burn out. Rev'd quicker and harder than it ever did with the stock iron heads.

With Iron heads this motor pushed a 3400# car to mid 12's

The entire drive train and axle went into the charger but it's 2800#'s. But if you figure .1 for every 100 #'s that still should have only put it in the high 11's had I left the iron heads on.

As far as fittment issues go, I seem to recall hearing stories of headmans not wanting to fit the eddys angled plug location.

I don't want to start a but for the he's spent on the headers and wanting to reuse those you might want to consider the stealth heads. Those heads plus the flow work might still be the same price as the OOTB eddies