Unless someone wants to take the trouble of checking the full suspension travel to see if the driveshaft stubs itself into the transmission there's no way you should take this for granted.

Do it right for $90 or run the risk of tearing up a driveshaft, trans, floorpan and/or rear yoke.

I did a similar but way different swap from an 8.2" GM rear end assembly to a 8.5". Driveshaft wouldn't even go in. Ran the car for many years prior to that.