If I ever take the radiator back out I'll likely do the oil pump just as insurance (and water pump while I'm in there!), but I'd still be hesitant to run an otherwise-stock engine out to ~8K regularly. I imagine you build up heat a lot faster that way, and other components may fail faster, etc. Maybe I'd feel different if an engine builder had gone over the thing and beefed up and balanced some of the components, etc. Maybe I'd set my limiter at something like 7.7 or 7.8 to give a little more headroom before shiftting in places, but maybe not. Right now I run it at 7450 on the soft-limit and 7550 for the fuel-cut, IIRC.
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