Interior swap from 03 work in a 94?

The interior out of a 03 will work in your car. If you swap some of it though I would recommend doing all of it as 94-98 had black and the 99-04 had charcol interior. The only things I know you will have to use specific will be the center trim bezel in the dash becasue the newer ones have a double din radio or trac. control switches and The shifter bezel. I would use all the newer parts though. You would have 6 way power seats that way which you will have to wire in and that is very easy. The cluster will have to be from the 94-95. I would be a direct fit and with the new center console you will gain the more desired cup holders and the ebrake should have the boot around it as well.

As long as he is using the same dash harness from a 94-95 all the other connections should be similar. It should work fine.