305313000 Miller 5" Blower Motor 1/5HP 115V 1-Speed Flush Mount
1 speed motor, 115V, 1/5hp, 1050 RPM, 42Y frame, 4.0A, CCWLE rotation (counter clockwise when viewing from back of motor). No run cap needed. 1/2" x 5.5" shaft. Includes flat mounting bracket. Motor measures 5" diameter x 4" deep.
Replacement for motors found in Miller AGC-55, AGC-80, AGC-80-1 MF55, MH-85, CMF-80, MGC-60-1, MGC-80, MGC-80-1, MMG-82, MOC-60-1, MOC-80 and MOC-80-1 furnaces without air conditioning.
The bracket is obviously different than the original bracket, but it will work. You will need to reuse your old screws. For other Miller furnaces in this series, look at motor 304418000 with angled mounting bracket.