On Z32 uprights for S13, you can run Z32 struts with S13 springs and S13 hats.

Actually, I've seen a set of Z32 rear S13 front koni yellows floating around, which would be an awesome setup for DD, drag, grip, and saying FU to harsh china-boop coils. With the right upper mounts and Ground Controls, you can go low enough to not get made fun of, too. But I digress. It's been a while since some asked questions about things other than how to crash at an oval.

Synchros are getting worn on that trans. Just slam that shit into gear. Another FS5W71C is like, what, $75? You're probably not being as hard on the trans as you think. That B&M shifter takes a ton of effort just to shift normally because they screwed up the leverage so much. Really getting ham-fisted with that shifter is likely just being somewhat aggressive on a stock shifter.