CPOM is doing a swap now with a 3800 , and there is lots of fabrication involved and matching up parts.Read his post on project pup and see how much he has done so far.Also another 3800SC was used , but that swap was done in an amigo , not sure if its identical to a trooper swap or not.

1996 Jeep Grand Cherokee 5.2 with mods.Hughes Air gap intake , 52MM TB , ford injectors, 2 3/4" lift, Doug Thorley headers , HID headlights with LED , HID fog lights , glow gauges , a few others