1935 221 timing gear lash

[KiWinUS]

Originally Posted by Zeke3

First of all, welcome aboard!

The only difference I am aware is a very obvious one on the 49-53 flatheads in that the angle of helical gear is opposite direction so that the thrust of the camshaft was opposite of the early (32-48) engines.

There is also a 32-33 crank gear and matching cam gear. Top set in pic is 32.