Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Apologies, crossed over with Trigger there while typing
That description suggests to me that early engines were 180 cranks whilst later were 360 BUT i have never worked on a "Bomer" so do not profess to know for certain if cranks, cams etc were different.Basic way to set tappets/valve clearance is to get the piston on TDC(pencil down plug hole) with both valves for that cylinder moving then rotate engine one full turn to TDC again and that is TDC compression which is where you set clearance.
It's a 450 Julie it turns from the left of the engine not the right as per a 4 cylinder. Sent from my Pixel 3a XL using Tapatalk