I don't see any adjustments if your starter looks like the picture (1941 Shop Manual).
http://chevy.oldcarmanualproject.com/shop/1941/41csm272.htm
You may have linkage wear issues.
Poor meshing can cause damage to your flywheel ring gear (time-consuming and costly repair).


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."