STEP THREE:
Select 1985 Isuzu Model:

1985 Isuzu I-Mark L4-1.8L 4FBI DSL
1985 Isuzu I-Mark L4-1471cc 1.5L
1985 Isuzu I-Mark L4-1817cc (G180z)
1985 Isuzu Impulse L4-1949cc (G200z)
1985 Isuzu Impulse L4-1994cc 2.0L