I once saw a buick v6 in a dodge farm truck once...so nothing will shock me.

Seeing as to how it's not the easiest/cheapest swap, why not just go to some shops and see what you'll get...

...or even better, call some scrap yards and see if they'll trade their best, lowest mileage magnum 360.

Having had pretty much a bone stock 360 magnum in my LRT, it was very very nice. Pushed me to 15.1's in the 1/4 and towed my buddy's Buick GSX like a champ (once spinning the tires through an intersection). Got 17 mpg unladen and idled w/ 24 inches of vacuum. Great engine...