No spark

You could check to see that you have power and ground at the distributor, for starters, but I think you need an expert diagnosis at this point. I'd recommend you get the car checked by a Mazda expert. There are too many things that could go wrong during an engine swap for me to be able to help you very much. If you want to find a specialist, here's a directory link for you: https://repairpal.com/mazda-repair-in-spring-mount-pennsylvania