47-59 1959 Viking 40 6 speed manual

[70C10Ginger]

Hey all, I have a mad scheme and some questions. I have a 1959 Viking 40 that currently has a 350 with a gm 6 speed manual transmission??? Can anyone help me identify it? I’m not having much luck.

I also have a 70 K20 with a sbc 350, sm 465 and a np205.

I’m in the process of trying to put a 12 valve Cummins in the 1959 and have a mad scheme to swap the sm 465 and put a three speed brownie box (slap shifter, gear splitter) in it so I have 12 gears.

If I can I would like to take the 6 speed and put it into the 70 k20 I have. So I was wondering if I could get some help on making sure I’m doing all of this correctly.

So, for clarification, I am trying to make a 1959 Chevy Viking 40 with a 12 valve Cummins, SM 465, 3 speed brownie.

And a 70 K20 with a 383 stroker, whatever that 6 speed is, and have the divorced NP205 still.

Am I crazy? Does this work? Will someone talk to me hahaha