Hi There! I have a question and was wondering if anyone knew if you can swap a complete 4.5 Liter V8 in a 1988 Caddy Sedan Deville for a complete 4.9 Liter from a 91 to 93 Deville. The wrecker near my house says this is possible, and that he has done one before in an 87 Deville, he says the 4.9L directly bolt up and all you have to do is change part of the wiring harness and ECM to make it run as a Multi-Port fuel injected engine instead of throttle body. Just wondering of anyone else knew the particulars of being able to do this. Thanks, Mike.