Are you making any changes to the bottom end?
I did a 2001 5.9 swap in my 66 Barracuda. I tore it down and had a machine shop hot tank, hone bores, new, main, rod, and cam bearings. Sent my cam to Oregon Cam Grinding for a regrind. Put it together with Edelbrock 2.02 heads with Comp rolloer rockers, Air Gap intake and 650 AVS carb. I used the front end off my 273 so I could keep the V-belts. Finished off with Doug's headers and a new PTC 9.5" torque converter (that's where your fun is!), and 3:23 Sur-Grip in the 8.75. it's fun, especially in the little Barracuda.
I'll agree with
@jazak5 that a 408 would check all your boxes. I see one in my distant future!!!