the carbs on the gteam website will they fit on a stock 12hp briggs motor its the first two on the site when you click on carbs
here they are
Modify Walbro Carb & intake. With Exchange...
G-Team Priced - $90.00 w/exchange
Without Exchange... $130.00
(Please specify pump or gravity feed)
New Walbro Carb - Race Ready!
Fully modify with air cleaner adapter.
G-Team Priced - $180.00
(Please specify pump or gravity feed)