miata engine to mx-3

Are you looking for steps to take you through the problem of if they are compatible. Which, by the way, I dont think they are.

i did not know there was a mx-3?

I highly doubt they are directly compatible either, but of course you can do whatever you want to as long as you have the skills or money and are willing to follow through with whatever it takes. You might have to fab engine mounts, a trans adapter and a million other things in order for it to work, down to the radiator hoses. That's Hot Rodding.