3.9 Liter V6 Swap

The highway mileage would be more from the O.D tranny than the V6,
Probably could cut up a 318 pan to fit. If you did similar hop ups to the 6 as a magnum 8 should make 3/4 the power as the 8. I seen one in a early a body at a car show this year but really just look like an 8 until closer inspection. Really no up side to the swap, but if thats what you want go for it , mounts and oil pan and maybe exhaust will be your main problems.