In my local truck trader there's a 318 with a 5spd. for sale. I'll probably call and ask the person, but I was wondering what trans. this would be assuming it's all factory? Thanks for any help.

Probably a NV-3500, The 318 is the 1/2 ton engine, The 360 was the 3/4-1 ton base engine, these would have had the NV-4500.
This assumes it is a newer 318. If older then maybe a Clark.

Eric