MI95Cobra New Member Aug 20, 2006 451 1 0 Oklahoma City Jun 17, 2007 #1 Jun 17, 2007 #1 what are the stock valve sizes from cast iron gt40 heads???
final5-0 Mustang Master Apr 6, 2003 6,817 12 79 DFW Texas Jun 18, 2007 #2 Jun 18, 2007 #2 1.54 1.84 Grady