I have read about the exhaust/intake cam swap for the 1.8L and I searched on here but did not see any info on swapping the 95 Mx-3 B6ZE 1.6L exhaust cam into a 90-93 1.6L miata head on the intake side. The mx-3 exhaust cam has the drive on it the same as the 90-93 intake cam on the miata I read on another site about the head being the same except the exhaust cam drives the timing.

 

I am almost certain both CH are the same.
You should check clubprotege, they may have more info, or MX-3 forums, if it still exists.

 

the head is an exact mirror of the Miata head. the cams measure the same.