Memco,
You absolutely have to keep these things cool. They will melt holes in the heads and pistons, and do all sortsof other bad things if you don't. I had a large by huge aluminum radiator and a Setrab Oil cooler the size of a honda radiator (ok..not quite). Mine always ran cool(180ish), even in Florida summers after that. The only thing it didn't like was idling in the paddock after coming off the track. As long as I kept the revs up, no problem though (throttle blip to 2500-3000).

Don't use a cheap oil cooler,they restrict air flow. Don't mount the cooler to the radiator with the common zip tie things that go through the radiator core. Watch oil and water temps.

I have pages of notes I will forward if you want. Some of them are from a very reliable resource---the rest are from me.

Jim