Technically, both the MA and 5 speed would need to blue plated as that model wasn't released with the 2.0L. In most cases you will need to fabricate a gearbox crossmember to take the five speed.
We use Keith from KCF Rallyport at Kippa Ring in the Mazda club. He's our club engineer and has the authority for most blue plates. He is very helpful, but give him a call first before you start as he is very particular on everything being correct.
Too many Mazda's in the collection. 4 Mitsubishi's, 6 Toyota's and now 3 Datsun's as well.
Putting together a Mazda/Japanese motor museum. New bigger venue for the museum has been bought, watch this space!