I'm very confused, because nowhere in this thread did I ever mention the word Edelbrock.
I'm referring to CHI, from Austrailia, the cylinder head that all the Cleveland and Clevor guys use to win the EMC's with. Dave Storlien, Jon Kaase, AD Performance, etc. They have to pick a head that makes the most power over a complete range, not at a very short peak, like a drag car. It's for that reason why I would pick them over anything else. I agree with you, an EMC engine is very much a dyno queen, but no other Cleveland head will produce that broad of a powerband, and that's what makes a street car feel strong.
600lb-ft is quite impressive, but I've seen CHI dyno sheets/graphs where that is available at a lower peak, and 500lb-ft is available at
2500 rpm. All of that was with a very, very mild solid roller cam, with .050" durations in the lower 240's. For a street car, I don't want a torque peak at 5000-5500, I want it down low where I can take advantage of it.
I realize that you're talking about a 393ci drag motor, and I'm talking about a 408ci engine built to make low/mid range power. However, I've viewed your website many times before and couldn't find any street/strip builds that reflected that kind of torque down low.