Cadofiles

Anyone have experience with installing later model Factory OEM Stereo’s in earlier model Rigs? i.e. ’95, ’96 or even newer Head Units in early ‘90’s Rigs. Or to spell it out more plainly: I would like to install a ’95, ’96 OEM (non-Bose) CD-Cass Head Unit in my ’91 Fleetwood Coupe (glorified Coupe Deville). Are the newer units compatible with the wiring/plugs in my Rig? Anyone ever take this on?

Thanks