ejw71 Posted May 26, 2009 Share Posted May 26, 2009 Yep, I got two head sets mixed up. Is 3973487 the head casting number for a '71 Monte 350, 300 hp? Thanks, Ed Link to comment Share on other sites More sharing options...
monte70car Posted May 26, 2009 Share Posted May 26, 2009 Ed here is some information 3973487....71-72...350..........1.94/1.5 or 2.02/1.6 valves, was also used on '71 350/330hp LT1, 75cc chamber 3973487X...71-72...350..........1.94/1.5 or 2.02/1.6 valves, 75cc chamber I believe you want the first number Link to comment Share on other sites More sharing options...
kc8oye Posted May 27, 2009 Share Posted May 27, 2009 head casting #'s will rarely be as specific as engine codes.. but occasionly you get lucky Link to comment Share on other sites More sharing options...
ejw71 Posted May 27, 2009 Author Share Posted May 27, 2009 Thanks, Monte70car. Wanted to have anothers opinion to back my belief. Ed Link to comment Share on other sites More sharing options...
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