Being a dodge guy myself, I guess I should mention the big block dodge engines. They can be had cheap and are very reliable with good parts availability. Motor home 440s are usually pretty easy to find. Just stay away from any motor home engine with the heavy duty heads, they are bigger, heavier, and top end parts are hard to find. Front distributor makes firewall clearance easier as well.
18 Ram 2500 4x4 Big C and a 6 speed
87 Blazer on 35"s