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The 4:10 rear-end was the "stick-in-the-eye," it "lived" when the 2;73 gear but even then it was border-line. The 4:10 let the engine "wind-up so much faster, pumping oil up to the top of the engine faster than it can return. I am a firm believer of using a stock pump unless all-out race with 7/8 Qt pan. Even the Olds engineers knew they had an oiling problem thats why the Toro had an extra qt oil pan and windage trays. Stock pump/stock pan is fine for a "regular" Olds with factory road gears. If you are going to race it then you have to take the next step or two in upgradng your oiling system. I have a habit of over-killing, my 98 has a 8 qt pan/main oil galley restrictors and a hi-vol pump, over-kill. Ken
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