Your Duster sounds a lot like what I would like to do in the future. Going to wait until the 360 gives out, and I get the 38 going. I keep telling guys that in 5 years, not many are going to be doing 340-360 upgrades, but it will be cheaper and get more power out of a 5.7-6.4 3rd generation hemi. Ok, it's not a real hemi to the old farts like me, but it does have power. Mate it up to my upgraded 904A and down the road one goes. Just my opinion, of course.