How can you tell what the rocker arm ratio is on these motors? I've heard of looking for some kind of casting #, but I'm not finding one on the arms that I'm looking at.
Am Looking For Factory/Aftermarket Speed Parts For The MEL (Merc-Edsel-Linc-TBird) Engine Family (383-410-430-462) Produced From 1958 To 1968
Also Early FORD Special Service Tools
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