Any aftermarket changes and the dipstick reading is just a guesstament. I was always thinking that my oil was low using the dipstick. Do what I did. Change the oil and filter, but just put 4 quarts in. Start the engine and let the oil circulate. Stop the engine and read the dipstick. Wait 5 hours and read the dipstick again without running the engine before doing the second reading. Add the 5th quart of oil and repeat the process. It looks like my engine (a 61 389) holds just short of 1 quart in the oil system until it has sat idle for a long enough time for the oil to drain back down. And that is hours not minutes.
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If you built it, drive it.
red 62 Tempest total stock restoration.
white 62 Tempest modified, 61 389 Tri-Power, and a conventional drive train.
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