I use a bright light and a mirror to check that the high point of the cam is facing away from the hole in the block. That minimizes the stress on the pump housing as the bolts are tightened. DO NOT stick a finger into the hole and ask someone to tap the starter to check the lobe position!

Just before you get the bolts tightened fully, rock the pump housing up and down with the fuel lines attached until the carburetor float chamber fills.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!