When placing the cover back onto the block, you'll notice that no matter how hard you try, the bottom of the cover pushes the oil pan gasket away from the pan to cover mating surface into the pan. By loosening the pan and allowing it to drop a little, you can bolt the cover down snug, and THEN have room to re-align the oil pan gasket from the bottom. You don't need to jack up the motor to do this. Do this - because after you put RTV on the cover to block mating surfaces, you don't have that much room/time for playing around with the alignment of the oil pan gasket. I learned this the hard way. I let the RTV get too tacky while messing around with the gasket and an oil leak started. Then you get to do it again. I have a 91 - my oil pan gasket is one piece silicone (you don't have to change it just because you drop the pan a little).
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