do anyone know the best gap for gt40 x303 heads?
THELAW1 New Member May 24, 2004 12 0 1 Apr 13, 2008 #1 Apr 13, 2008 #1 do anyone know the best gap for gt40 x303 heads?
BlownFiveLiter have car, will race....wait, it doesn't run 15 Year Member Nov 29, 1999 3,134 18 108 Chicagoland Apr 13, 2008 #2 Apr 13, 2008 #2 .052 - .056 Moved to tech.
