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Originally Posted By: mechtech2 .004" is as high and wide as I have heard for rebuild specs. You need to overcome this deficiency in your build. This is exactly the mentality that got me chewed up bearings twice in a row. After that, I invested in a dial bore gauge, and gave the machinist the...

I didn't see this before my last reply. I think this is useful information, thank you! Originally Posted By: OVERK1LL FWIW, we tend to run 5w40/15w40-5w50/15w50/20w50 in 302's at that power level (Mustang guys). I know two guys with stock-bottomed 302's at that power level that I know the oil...

Oil pump is a Melling HV, believe it or not that is the extent of the mods. But the engine makes max HP at a tame 5800 RPM, so at least it's got that going for it. I'm not opposed to synthetic, though as previously mentioned I will not receive the benefit of long change intervals. The fact that...

Yes, the clearances are wide. After running them closer (unsuccessfully) I have followed the advice of a reputable Olds builder who has experience at these horsepower levels. Really the problem was getting the machinists to comply with my directives. This time there was no glitter in the oil on...

I appreciate all the quick responses! I planned on using a 15w40 or 15W-50 synthetic oil, but my concern after extensive reading here on BITOG was the fact that these oils tend to be pretty thick at low temperatures. I wanted to be sure I should not be trying something like a 5W-40, not knowing...

My brain is numb from looking at so many PDS's and forum threads. I need some expert advice on selection of motor oil. 1. Vehicle: 1966 Olds F-85, 455 V8, 538HP, 100HP nitrous plate 2. What your owner's manual says: N/A 3. Where you live: Southern Idaho 4. How you drive: Cruising...