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What tranny do you have.
NP203 all are fulltime unless a part time kit have been installed. Case iron chain driven, one heavy mofo
NP205 most desired case, part time all gear cast iron, not as heavy mofo
NP208 light weight aluminum housing, chain driven, good low
NP241 same as above but with a different ratio some 88s and all 89 autos
You could get :
TH350/NP203 full time(factory built)
Th350/NP203 with aftermarket part time kit
Th350/NP205 part time (factory) <--best all gear driven cast iron case
Th350/NP208 with aftermarket tranny tailshaft adaptor
Th400/NP203 rare
Th400/NP205 hard to find
SM465/NP203 rarer
SM465/NP205 most common
SM465/NP208
700R4/NP208
700R4/NP205 with aftermarket adaptor
700R4/NP241
I prob missed something. It depends on what tranny you have to work with and what kind of use the truck will be for.
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Cruiser: 1972 K5, 400/TH350/NP205, D44 and 12Bolt, 35 TSLs.
Trail rig: 86 K5, 350 TBI, SM465/NP205, 5.13s, 14ff locked, h1 beadlocks, 42" TSLs, 64" rears, 56" fronts, D60 locked, 35pline, drive flanges, crossover, hydro assist, OBA.
Tow rig: 2002 F350 PSD CC Dually FX4, chipped, cold air intake, BFGs
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