Just because you use a higher flowing head and a biiger cam doesn't mean you are losing power on the bottom. You may lose a little or you may make more, but with the correct combination it is pretty certain you will make more power in a higher rpm range. I read all of Cliff's posts for a long time and pretty much what he has always said was, he can shift at a higher rpm and not gain anything, so why turn it harder. To me that means his car has a very flat power curve that extends well above 5500, but he has no use for that power because it doesn't make the car go quicker.
I just got back from a trip in my GTO, and I can tell you that it is plenty streetable. I have been in the car for probably 10 hrs over the last two days and logged probably 500-600 miles. I have 310 cfm heads and a 242-250 hydraulic roller. I can't see why anyone needs more bottom end power than this thing has. It is a stick car so that will pretty much let you know if you are bogging it down. Anything from about 1800 rpm and up, it just goes. If it was an automatic like Cliffs and others, it would never get below that rpm I would think.
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