[TerrysSPF]

I have Edelbrocks on my side oiler and agree with the above; they need to be "massaged" at the very least. Stock intake/exhaust on the Ebrocs are 2.09 / 1.66. The best thing to do is order the barebones Ebroc heads and have all the valve stuff custom done. Mine are ported with SS oversized valves massaged 2.19/1.73 to 2.25/1.75, port matched to my Ebroc intake. -They breathe pretty well.

To get more, you could send them out to Keith Craft for some of his magical port work. -He simply does the best head work out there today, largely due to his $375,000 digital CNC milling machine. I've considered sending him my heads to get me into the 600+hp range that a lot of Cobra folks seem to be looking for these days (I'm currently around 540hp - which was a lot back when my engine was built in late 2001). However, you really need to consider a CAM change as well when doing extensive head work (IMHO). -But Keith can help you with that as well.

-Best of luck.