Well, if it helps anybody make a decision the A4 which looks like a dug up artifact is an early model- something around 1965 or prior. Still has a lower front block drain plug so hopefully water wasn't trapped in there many winters ago. Something that was eliminated on later models was the little hand pump pictured on the side of the oil pan -used to get the last pint of oil crud out that the a dipstick pump doesn't 't get.
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