This is a 1937 Synchro Ace Model Airplane gas Engine that was used in model planes and cars.
This engine is equipped with a SPARK PLUG not a GLOW PLUG
Specs for .562 cubic inch engine
Oillite Bearigs
Champion Spark Pug
Bore: 7/8"
Stroke: 15/16"
Speeds: 800 to 8,000 rpm
This engine is in good condition as last used. It turns freely and has good copression. You will find an add for this engine Popular Mechanics, FEB 1937, Page 135.