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SINGLE vs DUAL VALVE SPRINGS ? when are DUAL VALVE SPRINGS REQUIRED ?

Started by rav440, January 27, 2008, 08:38:54 AM

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rav440

the 346 HEADS im looking at to get have CRANE single valve springs part # 99839-16 . so when does a DUAL valve spring come into play ? what size cam is max for a single valve spring ? and with a DUAL valve spring do the heads need more machine work done so the spring will seat on the head .

thanks RANDY  :cheers:
1973 PLYMOUTH road runner GTX