I've been given the opportunity to buy a late 90's Deville witha cracked block for very little money. I have a '78 chevy 350 4 bolt main in the machine shop right now. I was wondering if the older 350 will bolt up to the northstar front-wheel-drive transaxle. I know I will have to make a few changes to make it work. Any help is appreciated.

No, it won't bolt up. That, and with the electronics in the Deville, with the trans being computer controlled, it would be a real pain to get it all to work. The easiest thing to do is get another Northstar!