1985 gsl se runs rich and has a random missfire please help
 

I just got a 1985 gsl se 13b great condition have done a full tune up and done some basic checks but it seems to be running very rich and has a random missfire. This is my first rx7 so I am in no way a rotary expert yet just looking for ideas what to check or test to fix my issue. Any help would be great.