NOTE... Just posted this in the tech section,... thought I'd put it here too, to allow any discussion or comments.

Problem,... trying to figure out if you are on the compression stroke when you line up the timing mark...

Solution,... With the valve covers removed, and the timing nut accessed,...
Crank the engine counter-clockwise using a 17mm socket in the timing hole, with your left hand, while resting the fingers of your right hand on the intake rockers...
When you feel the intake rockers go down,... you are approaching TDC of the compression stroke,...
Now look into the timing hole and watch for the mark to line up...
Bingo!... you are lined up, and on the correct cycle for your valve check...  ...


image borrowed from Digger..
PS...Digger,... hope you don't mind my using your excellent photo...  I'll remove it, if you wish... just PM me... ...