That is a pretty common swap (at least with an NA). You should be able to find all kinds of info on it. A Turbo Rotary is not a common swap into a Miata (drivetrain won't take it very well).
Either way, welcome to the club! Hopefully you will get the swap done soon.
__________________
1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers)
1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)
|