1985 13b in a 1988 SE
 

I have a siezed engine in my 1988. Been looking for a good used motor for several months. I just bumped into a 1985 13b in good condition. Will this work???

Not without a decent amount of modification. The 88 motor mounts are on the center plate of the engine while the GSL-SE are on the front of the engine. You could do it but it wouldn't be worth the effort.