95 & 96 should work better on 98. S13 transmission doesn't have a hole for crank position sensor, so you will have to drill the hole on the bell housing. It's easy to use s14 transmission on s13. The other way is harder, but can be done.
Scroll to the bottom. It shows S13 / S14 Compatibility.
http://my240.epijunkie.com/Aut..._body.
Modified by 94_240sx at 1:27 PM 2/22/2008