Chuck I've always used the #86's.I would think the 303's would be colder. Dan Nees cookiedan@domain.elided The "Good" 1979 Scout II 345/auto The "Bad" 1971 Scout II 304/T-18 And the "Ugly" 1979 Scout II 345/auto http://members.tripod.com/~IHCaholic/scoutindex.html