Jegs has Brass High flow stats that have air hole already. You have to order the one for Chrysler (bigger size) and it fits the origanal FE tank for the 427 great. I have a 180 temp and it works great. The opening is double the stock stat.
www.JEGS.com PART # 720-4367 for $9.99
http://www.jegs.com/cgi-bin/ncommerc...br=76&lastcat=
Good luck, Scott