This is one of the reasons I went with it and increased oiling to the top end, so I could parade the dang car with a minimum water temp of 207*F,at 4 mph, which with my gears is 550rpm. (Just try that trick with a manual trans, a750DP, and a 292/292/108 cam.) I wanted my expensive aluminum rocker arms to live.
The thing about a street car is; I'll guess 95% or more of a streeter's life is spent well below 4000rpm, yet we build them to go ~6000. Every system has to be re-evaluated for it's intended usage.
Ask me if I care about 4hp at 6000 rpm, when my tires are spinning? Ask me if I care about 20/30 hp at 5500; the tires are still spinning, and I still don't care.I care about my rocker arms and they currently have over 100,000 miles on them, so I think it's working. I traded away my 292/292/108 for a 270/276/110 and was very happy about the deal. And that 270 cam about halved my fuel usage. Double-win.