What changes to the tranny and Transfer case would be need to bolt in a AMC 290?
The 290 was used prior to the switch (in '72) to the Torque Flite transmissions so the crankshaft input hole is different. It would be better to get a V8 used from 1972 and on. You will also need a V8 motor mount kit, like the one offered by hypereagle., I am guessing the drive shaft may have to be modified for length as well. Hassle wise you would be better off dropping a 4.0 in. More net HP than the stock 290.
4.6 stroker for the win! LOL!
Actually, someone on the AMC forum has a no drill kit that has a crank insert and bellhousing spacer similar to the TH400 adapter I have below. Not EXACTLY the same, but similar. If I had a lathe and drill press/cutting table it could be made pretty easily.
You'd need a custom balanced flexplate (less than $200) and you'd need to decide which trans to run. I briefly thought about using a TH400 (Jeep with nailhead adapter) and Chev NP output shaft with the input gear for a Chev NP208 swapped into a Jeep NP208.
Way overkill for a 290, but it would be fun for a 401! ;)
(http://i6.photobucket.com/albums/y209/carnuck/tech/th_photo-19.jpg) (http://s6.photobucket.com/user/carnuck/media/tech/photo-19.jpg.html)
(http://i6.photobucket.com/albums/y209/carnuck/tech/th_photo-5.jpg) (http://s6.photobucket.com/user/carnuck/media/tech/photo-5.jpg.html)
(http://i6.photobucket.com/albums/y209/carnuck/Travelall/th_nailheadflexplate.jpg) (http://s6.photobucket.com/user/carnuck/media/Travelall/nailheadflexplate.jpg.html)
(http://i6.photobucket.com/albums/y209/carnuck/Travelall/th_Early_vs_Late_Crank.jpg) (http://s6.photobucket.com/user/carnuck/media/Travelall/Early_vs_Late_Crank.jpg.html)
290 (and other '67-'71 AMC V8s) on left. '72 and newer on the right (same pattern as '72 up AMC inline 6 as well. Postal Jeep excluded)