3.9 Liter V6 Swap

I don't think I would do it. I believe I would stick with the slant. In my experience, the straight sixes were peppier than the V6s right off idle. I don't know the physics of it, but IMO they were. Maybe the crank being so long. Maybe something about the crank phasing, I don't know. But I've worked on a PILE of V6s and not one of them, not even the GM 4.3 had the off idle SNAP any straight six had.

Don't get me wrong, I ain't dawgin on the 3.9. How can you? A 318 V6 pretty much is what it is. Cannot go wrong with that design. It's just not a point I had seen brought up and I think it's a true one. While the V6s have more power overall, I am sure, the little slant has balls right when you crack the throttle that the 3.9 simply does not have.