flywheel key

attempting to get a 1971 Italjet MM5A running and need to find the points and a flywheel key. we will build the flywheel key if necessary... but if you have any info on supstitutes or ideas where to find the points, please share! thanks much. :huh:

i have a tecumseh HS50-67168C that is not getting spark i was told to check the flywheel key (i guess it is prone to shear off) but i have no clue how to check or replace can any one help me please?