Where to begin new build

[Field and Son]

I am reletively new to trucks and have a couple I want to work on. I want to start on a 1970 C-10 Chevy. I want to paint and rebuild the complete drivetrain with original 6cyl engine and 3 speed tranny. I want to add airbags but not do any frame or body mods. Maybe power steering and or power disk brakes. I want to do something different with the engine maybe tri carbs or something. Having never done anything like this I am not sure the best place to start and I prefer to work and drive as much as possible. I have no intention of body or paint work, but just mechanics. Any ideas??