I believe most V8 Jeeps from 1971-1991 should have an AMC engine and a 727 transmission. CJs, Full-Size Jeeps (SJ Cherokees, Wagoneers) and J-series pickups. A Wagoneer is probably easiest to find, almost all 1980+ Wagoneers are 360s.
In the off chance you find a Quadra-Trac 70's Jeep with the Turbo-Hydromatic 400 you'll probably be able to trade that pretty easily so I wouldn't let it go, but they're less common. They might even be desirable to some guys. I think they're way too big to fit into an Eagle and the front drive shaft might be on the wrong side.