^^what he said...

in order for the 99-00 valvetrain/cams to work to its full potential in the 94-97. you will just have to swap the solid lifters from it as well. It will work with the hydraulic ones but it will be useless. thats how it has to be setup to work on the protege Bp's so im guessing it has to work the same on the 94-97 miata 1.8s.