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Old 03-28-2012, 08:48 PM
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this cam like 14 to 18deg initial 34 to 36deg max @WOT.

a max of 10 to 15deg vacuum advance added at hiway cruise part throttle

Champion RV8c or AC delco R42T plugs .035" gap.

The stock GM 400 SBC heads suck even when ported.
Find some vortecs.
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