A little reading describes this.
Martin built a series of bombers for the Navy, the T1M through T4M. They were a main component of air wings on Lexington and Saratoga through the 1920's.
A three person aircraft, the fuselage was large enough that it had some life in the 20's as a commercial aircraft as well. Right up your alley, Don.
In 1928 Martin sold their Cleveland factory to the Great Lakes Aircraft Company, who then built the aircraft as the TG- series. That company is apparently still around in some form in the acrobatics market.
Your aircraft has a Wasp radial. There's a review of the kit that suggests the instructions make it sound as though the engine has a cowl ring, but it's exposed cylinders. I probably wouldn't bother to wire them.