For 1986-93 3.0L 4-cyl, 120-1630 Hp | 4.3L V6, 160-165 Hp | 5.0-7.4L V8, 185-330 Hp small block GM engines with 14 1/4″ flywheels. Bottom mount, offset bolt pattern, CW rotation.

also crosses with:
Sierra: 18-5910
ARCO: 30470