I had the fuel pump eccentric wear out on a 318 I had, it was either take the timing cover off and fix it or go electric for the pump. you might be able to see it with the pump out with a mirror or bore scope.

2003 Dodge 3500 Diesel

1964 Plymouth Savoy White 2dr sdn. 512 stroked, Dominator, New Best 9.75 @ 138.50mph
2019 Challenger Scat Pack 1320 White Knuckle-K&N Cold air filter, Billit Oil catch can, drag radials stock 11.911 @ 114mph