Jeff is right about the vacuum lines, but one other thing that you have to find is an early plenum with the EGR.
Otherwise a chip with EGR delete and a bung will fix the EGR issue that will arise from using a plenum without the EGR on an EGR equiped car.
I've got an '89 auto...had EGR
Bought a '94 supercharger...had to reroute vacuum lines to get it to work right.
Bought a '92 SC...swapped blower, but no EGR...I had the port completely filled in and then ported back out for a larger TB. No isssues with vacuum lines on this one.
If I'm not mistaken, I fixed the '89 inlet plenum so it has the same vacuum lines as a later model and has the EGR. If your buddy needs it to get it to work, drop me a PM.
You may run into codes with the MAF/injectors. The MAF is the same from a '91 (I think) and up. However, in '94 they changed injectors to 36 lb'ers instead of the previous 30 lb'ers. The tables are in the EEC, so it will need a chip to run properly. It will probably run, but I wouldn't push it. A chip is roughly $300 and a dyno will (with the tune) would help out much more. You'd then be looking at close to $400~ for a dyno tune. Small price to pay to make sure that you don't blow an engine up.