I have my old bottom mounts off my Stances you can check the size and thread pitch with.
as for the bushing bindage I think thats only an issue with S14's
Heres how mine sit right now

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後輪駆動車1番
1989 Built SR GT2871R -363whp
1998 S14 W/RB25- 250ish (For Now)
1986 SR86 - 200ish
1990 R32 GTR - 320hp
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