Hi Adam
I was thinking about it and maybe you should just get a 318 or 360 and we can build it while you drive the /6. It would be badass and everyone that rode in the car would take a big juicy dump in thier pants but we can build even a 318 pretty nicely to run low 14s in the Dart and it'll be cheaper and way easier. We can pull a 318, an 8.25" rear, a 904 trans and a driveshaft from the yard. We can both build the 318 with an edelbrock carb, intake manifold, camshaft and lifter kit and valve springs, a cloyes double roller timing chain set, stock heads (or swirl port heads if you have the money), flowtec headers and 2.25" duals with flowmasters, and of course electronic ignition and a Chrysler orange box ECU. That combo should make good power till 6000 rpm with no mechanical complaints. With stock heads, that's good for almost 300 horse, and with ported swirl ports, 330. I'll take care of building the trans. A 2500 stall, kevlar bands, Raysbestos Z-pack clutches, koleen steels and an increase in line pressure should work nicely. Even with 2.76 gears, the Dart would fly, but with 3.55s or 3.90s you'd have a beast. All that will still take less time and effort than retro-fitting the 440 into there, and won't cost an arm and a leg either. You could use a 360 and get even better results, but a 318 would fit in with probably no modifications at all.