Help me make sense of this (1965 4x4)

[Codyweber]

Alright, So i bought this project from a friend that bought the project off another guy who i believe passed away. So i can't reach out to the original owner. The problem I'm having is that I can't really figure out what i have here. Its a 1965 SBC truck that is ether a factory 4x4 or someones project turning it into one. The truck had what looks to be a 2WD transmission and possibly a divorced transfer case.(didn't come with the project).Where I'm most confused comes from the drivetrain. I acquired a SM465 with a NP208 that i wanted to throw in. Today i started pulling the trans and noticed that the bell housing is bolted to the rear crossmember.. The engine has weird cradle style mounts/crossmebers instead of the clamshell style mounts. I guess what I'm trying to find out is what this thing is? Is it original? What should i need to move forward with this project? Can i even use the stock style engine mounts(70s-80s Style) Any help would be greatly appreciated. Also, I have done a few engine/trans swaps in the past and am not a complete idiot when it comes to these trucks but i have never come across this stuff before.