The popular swap for RCs is recent years has been a Cummins. Have seen a few variations on the theme but most seem to keep the trans, xfer, axles from the donor pick up. Have even seen 2000ish dash swapped in to 70s bodies.

I did consider scooping up this roller as a cheap place to put one of my spare 440s but had a life change event. I kinda like the G3 Hemi idea and may have accidentally nudged him in that direction. We got in to a tangent discussion about the hack job LS install in a pop top that was on craigs.

I'm kinda surprised how much fab is going in to making it fit and wondering if truck exhaust wouldn't have bolted in. If I know anything about this guy, I know this: he's having more fun doing this than just bolting in another RB and when it's running it will melt the tires.