1988 Ford LL9000 Engine: 14.6L L6; w/ CAT 3406; Cummins NTC 444 Engine;. 1989 Ford LL9000 Engine: 10.0L L6;. 1989 Ford LL9000 Engine: 14.0L L6; w/ CAT 3406; Cummins NTC 444 Engine;. 1989 Ford LL9000 Engine: 14.6L L6; w/ CAT 3406; Cummins NTC 444 Engine;.