Most Coupes I.ve seen are in the High 800s to mid 900s. As you may be aware or Not the coupe in its original form ie: without mods is very difficult to get out of CG regardless of the load in W&B calculations however keep in mind the HP required to lift and pull it as long as the CG is not violated. Remember MAX Conrad a somewhat 50,000 hour pilot flew around the world in a SE Commanche some 2000 lbs over gross but in CG range most certified aircraft frames are stressed tested to 3.8 times the gross weight prior to being FAA certified ie: 1260 x 3.8= 4,788 lbs. keep in mind CG and HP and trim I would not recommend flying over gross to anyone this is just computations and the engineering incorporated by any certified aircraft manufacturer.
flyboy
