Hello, was wondering what accommodations would need to be made to swap a 4.5 from an 88-89 Cadillac Deville over to an 87 Deville. For example would i have to swap all of the bolt on's from the 4.1 over to the 4.5? Or would i be able to get away with keeping some of the 4.5 parts? Desperately trying to save my caddy from the scrap heap so any information would be greatly appreciated.