Bigray, I think it is facing the valve, but double check me on that... it has been awhile.
Am I the only person out there that has fouled Autolite, NGK, Champion, etc... THEN WENT to Bosch "Platnum" & never had a problem since??? When jetting or tuning a carb (such as new one) I will never run anything else... they simply don't foul. I had NGK, & crossed over the correct heat range for my BBC & never had a problem again... they cost more, but who cares. JMO