Engine and Transmission Swap

I was wondering if its possible to swap a 98 SL Engine and Transmission into a 94 SW...

If so what are the differences?

Thanks.

Unfortunetly NO this will not work. Your '94 uses a vacum EGR. The '98 uses an electronic. There is NO adapter to convert the electronic to vacum. The entire '94 head would have to be put on the '98 block. Otherwise you will have an SES Code and not pass emmisions tests. Its easier and takes less time to get a '94 engine or a new car.