transfer case

Hello everyone! I have what I hope is a relatively easy to answer question: I want to convert a 2wd ICE vehicle to a 4wd-ish vehicle and i'm wondering, to transfer power to the front wheels I assume I will need to switch out the whole brake/wheel/front suspension assembly for a 4x4 one with...

I have an idea for an eREV that is a 1/4 ton truck kind of like a ranger or an s10. I'm having a dilemma as to what kind of drivetrain I want to use. 4WD is a must but the main question is one big motor or two small motors one in front and one in back. Also transmission or no transmission. I'm...