Reply to "casting numbers?"

George PAdmin.

Dennis, if its a '73, those are the small size valves, i.e. 2.05"/1.65". Small is a relative term, as they are larger than the valves on the premium small block Chevy head of the era (2.02"/1.60"). The valves on a 428 Cobra Jet were 2.09"/1.65". I can see in the picture those are the oem Ford valves, they should be replaced with 1 piece, single groove, stainless steel valves. When doing so, the valves can be upgraded to the larger 4V size valves, i.e. 2.19"/1.71".

George

8/4/0612:44 AM

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