Nope, it's a bulletproof V8, but the Chrysler Corp. did make a 3.9L V6 in the late 80's which was basically a 318 V8 with 2 cylinders chopped off.
V6 turbo is better
Yup, same thing. The Chrysler Corp. used the same LA Block 318 from 1967-2002, With a few updates here and there, so if your trying to use one in a car from that year to go in another, it'll work.
inspect the auxilliary radiator fan.
Mustang
yes is does