P & G Valve Gapper question

The P&G Valve Gapper, model 300, which I have includes an Inner Barrel "1", and a Base Adapter "G", along with other barrels and adapters. Neither the 1 or G show up on the small application chart included with the tool. Hopefully someone has knowledge of what engine(s) these two pieces fit? Thanks.

 

Try the info here.
http://www.box.net/shared/qvzpcuka13

 

Thankyou for the valuable information!