Re: My 56 6bt 4X4 build.
That's what I thought, they both have the bigger input shafts on the nv4500s also.
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Tony
1985 GMC K2500 restoration Project: Rust, White & Blue
1989 Chevy R3500 CC Cummins & 4X4 swap some day...
1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress)
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