Well, you are in virgin territory here. It's likely doable, because some things stayed the same between generations but the packaging did not.
You have a 4g15 motor now? There may be a difference like a window plate in the distributor needing to be flipped or something along those lines once wiring is lined up, if that can be accomplished with the wiring that was/is there now and how it interfaces the ECM; which is wired differently on likely all pins because the platform changed between 92 (3G) and 93 (4G) CSM's.
If no one has experience with this here (or in an appropriate amount of time), then try the cool cats over at Mirage Performance Forums (MPF). They be like 4G+ guys. wink wink.
www.mirageforums.net