Sooooooo----- what are the basics involved? Just give me the ghist of this. My dad probably has a rough idea, but some of you have already done this it sounds like. So what I need is an engine (obviously) new engine mounts (I assume) and some adapter to hook the engine up to the tranny?
Just give me a rough grating over if you will--
In a nutshell:
Adapter plate, engine mounts, flex plate/flywheel, fuel lines, lift pump, minimal wiring.
TH350 isn't going to cut it TH400 bare minimum and keep the power low on the fuel plate.
Torque converter with lower stall speed than gasser. A 6BT is nearly "all in" by 3500-ish and a mouse or rat is just beginning to wake up.
Assorted brackets, hoses and cables/linkages.
Exhaust, natch.
Seem to recall some passenger side frame rail massaging. Possibly a body lift to clear hood or cowl hood. Depends on how you install it sometimes.
Front suspension is going to squat under a 6bt's 1200lb fully dressed weight. Might need front springs or a re- arch if you don't like what you see or feel.
Probably forgetting some bits but that's the meat.
You can go all aftermarket or you can junkyard shop for things like adapter plates for a TH400 out of a 4BT delivery panel.
Plan on dropping anywhere from $5,000-10,000 depending on how good a scrounger/fabber you are or how picky you are....