I just purchased a 99 Callaway. It needs an new block due to slipped sleeve. However, I have a 2002 Bosch engine from a wrecked rover. I have the entire engine including a/c unit , alternator, and all trimmings. My question is, can I convert the Callaway's 1999 4.6 Gems to the 2002 4.6 Bosch? What modifications will I need to be prepared for? I did grab the becm, transmission computer, suspension computer from the salvaged 2002 rover.