Just a thought (I've seen it before) If it had a timing chain with the plastic gear go away and valve seals got hard and broke up, chances are the oil pump pickup could be plugged. You might get by just pulling the pan and cleaning the pickup screen.
1957 Plymouth (Hemi, Dual Quads, A833 4 Speed 9 1/4 w 4.10) Sold 1937 Dodge Pickup (Hemi, 6X2 intake, 46RH, Dana 60 w 4.56) Sold 1968 Plymouth Valiant 2dr sedan (354 HEMI, 46RH w/4.30 gears) under construction
