I need a starter drive. I think they used the flywheel off the original engine. I bought a starter for a 1947 to 1955 and the drive gear is bigger than mine. But every once and awhile if you have to crank more than a turn or 2 the Bendix kicks out.
You have to find the original engine's serial numbers to know for sure what kind of flywheel is on the 54 engine.
You might be able to drop the flywheel housing
UNDER PAN and spin the flywheel to check for a part number cast into flywheel.
You have to determine if the
kicks out problem is coming from the flywheel or the starter.
Is it the new starter that kicks out or is it the old starter?
If it is the old starter it Probably needs a new starter drive "Bendix".
If the drive gear is bigger than yours, they may have sold you the wrong starter.
1929 - 1957 Chevrolet Master Parts & Accessories Catalog shows
Group # 2.086 DRIVE ASSEMBLY., Starter Motor
1938 - 55 All, COMMERCIAL. 6 volt, part # 1873789, Are all the same drive assembles.
Illustration Your starter is the same but without solenoid unless COE has one.
Mechcanical Shift Starter linkage