Help. Will these parts work in a 1966 c10?

[luvbowties]

Hey all. Been gone awhile, but still plugging! I've long ago done my 1966 and don't recall exact years I used as donors for disc, 5-lugs, differentials, etc. Good friend just bought his starter, a 1965 C10 w/old 6 cyl et al. He wants to update his truck with v8/auto & all the goodies to use for a daily driver. I have what I can sell him--an honest 77000-mile chevy 20 series van w/5-lugs plus all the goodies he wants; he would have an ALL-in-1 pkg if the stuff will adapt.

He has a well-equipped shop, is a pipefitter/welder and knows how to use all his stuff including lathe,milling machine, mig and heliarc welders. But I don't wanna sell him what won't fit or adapt easily. He has driven/checked the van--really too nice to part out--yet he's a friend & this would provide him with a drive train he now knows can be swapped-and-driven w/out ANY repairs. Will this be a good purchase for him, somewhere around $15-2000; it has the eng/trans combo plus possibly all the other stuff--373 diff'l, 350 v8, 700R4, tilt column, pdbrakes, 5-lug axles/rotors, p-steering, cold ac, hd sway bar, etc--every option he wants to put in his truck.

I've told him I think he will need to buy a ps gearbox, as I've heard the van boxes turn backwards from pickups.

Thank you in advance for your knowledge/help.