any dakota guru's? i have some questions

has anybody swapped a v8 into a 3.9 v6 dakota? or does anybody here know this 3.9 motor?
I know it is basically a 318 missing 2 cylinders but have never owned one, is it worth rebuilding? or beter to just put a 318 in there?
I scored a 90 dakota 5 speed 4x4 3.9 v6 with a bad motor. can this trans handle the 318 or 360?
what other mods are necesary?
thanx for any help or info. i think it will be a good truck either way, i need to dig in and see what is going on, it may not even need a motor...