dont do it!!
This is not a good idea because of many problems.
First GSRs have hydro transmissions so expect to pay big bucks to convert it.
Second GSRs are obd1 and you have obd0, so lots of rewiring for vtec, knock, dizzy,ecu,alternator. It's all different!
Third b16's are cheap right now and can always swap the block after you've done the b16 swap.
My advice if you want to drive your project in the near future; just do a 1st gen b16 obd0 swap. It is plug and play. Save money for basic mantinance like ball joints, tie rods, bushings, ect.
If you dive into a b18c swap, you will run out of money before it ever runs, trust me man I've seen it happen many times, do whats easy and build from there. (b16/b20V