402 Big Block Rear Main Seal

[toolfool]

Tell me the best brand of rear main seal to buy and what you would seal it with. I am going to do this in the truck. I am losing almost a quart of oil every one thousand miles. The rebuild on the motor is really strong and it starts and runs great. I just need to get the rear main seal oil leak fixed. Please mention any tricks or the important things I need to do. This is a stock block in a 1/2 ton truck, bored .040 over, crank was just reground for the first time.