[Bill72]

1991 was the last year of the np205 and the first year of the 4L80E for GM. So that is the only year you could get that combo from the factory. Also it was the last year of the V trucks. If you wanted the 454 TBI and 4L80E and the np205 from the factory, the only truck to ever have that was the 1991 V3500 crewcab.