A few thoughts. The most powerful version of the 3.9 puts out 180 HP. A 20 HP gain gets you to 200 HP, a 50 HP gain would get you to 230 HP. A stock 318 (5.2) Magnum puts out 230 HP. For a lot less hassle and time, you could sell your V6 Dakota and use the money towards buying a Dakota that already has a 318 in it, or if you're really lucky, you might find a Dakota with a 360 (5.9 Magnum) which gets you 245 HP. Even the standard 4.7 V8 came with 235 HP.Did a hundred mile delivery this morning pulling a little under 2000 lbs. Got that feeling again the 20 HP more would get it done and 50 would be a dream.