I just tried putting a Cloyes gear drive in a 400SB I have. There's seemingly way too much play. It's a 4 gear setup (dual idler), and I can take one of the idler gears and move it over 1/8 of an inch up and down. Turning the crank back and forth, it takes a bit before the gears to turn the cam because of the play. Now on the gear on the crank, there are three "ways" it can get lined up... with three symbols- a triangle, rectangle and square with a rounded top edge. Right now i have the dot on the bottom of the cam gear lined up with the rectangle on the crank gear. Does it matter which symbol I am using to line it up?