1969 Swinger 340
That shifter is on my wish list, someday I'll hopefully upgrade. The 5.9 with the ax15 will be a nice combo in your duster, that's what I have in my 95 Dakota (originally a v6 truck) and I haven't broken the trans in 60k miles of "spirited" driving. If you want any pointers on an efi swap let me know, I have a 68 fury with a 5.2 magnum and I converted my cousins 46 ford to an efi magnum as well, and it's a cheap, easy swap! I was originally going to do the same in my dart until I fell into the hemi and got sucked in, lol.