It's possible with some simple fabrication and no body modifications, so not bolt in, but not hard.
The power is better than the gas engines with the potential for lots more. Fuel economy should be around 25 in a 1 ton truck or smaller.
I would not use a 1/2 ton.
The 6BT is just a little to long to make for a simple swap, the 4 cylinder is a better fit.
Grigg