You can do it but it's a lot of work!
Rear mounted radiator, tougher axles, etc. etc.
About all thats left of the Samurai afterwards would be the frame, body and some of the electrical system.
I remember someone with an Olds 4-something V-8 at the 'Melt once. The driver rolled it during the Night Run. They had to leave it there until morning because it was impossible to flip it back on it's wheels in the dark as it was wedged against some trees.
I recall it was fun to look at but a pig to wheel.