jdm S1 fixable w/ 90-91LS tranny?

OK i’ve searched and read that some of the stuff in the s1 can be repaired w/ 90-91, like I’ll be using my clutch and certain things like that. But does that mean that I can use a 90-91 fork in the short geared s1. Also, the whole synchros thing can be fixed w/ d-series tranny, anything else that can be fixed w/ d-series?

Another clarification, I can use a ys1 in my 91 w/ a 92+ clutch (is that it?) and that can be fixed w/ g2 gsr(ys1) tranny parts off the dealer or even del sol (vtec) tranny parts, right?