You'd have to check the PN's on the 3.9/diesel bells to see if they were the same. My only real concern with the Jeep diesel bell is that Jeeps frequently have the starter on the passenger side for space, but I don't know if the Liberty is the same as the Cherokee/Grand Cherokee in that respect.
My EFI is from a 1990-1992 Camaro Z-28, and I'm recalibrating it to like my 72 340 with cam, headers, etc. So far, it's very frustrating. Think of tuning a carb where you have to choose from an infinite quantity of jets, air bleeds, and emulsion tubes... Getting closer, but I'm not very patient...
