worked on a 283 one time with aftermarket chrome dip stick . had lifter tapping like crazy . noticed oil was nasty so i did a oil change and filter . just to check things i drained the oil in a clean tub and found just over 2qt was all that was in it and the canister filter body drained also and the dip stick said FULL
i finished the job and added 4 qt of oil and fired it up and she was SO MUCH BETTER sounding . i then marked the dip stick for 4qt low and added a 5th qt and marked it for high . i then cut off almost 3 " of length of the dip stick tip .
not saying this is your problem but could be .