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So when using Bobs cam you run basically stock 906 heads and exhaust manifolds? What does he recommend for compression? I really want to give his cam a try. I need to go through my 70 440 6 pack motor and was curious what needs to be done per Bobs recommendations. Thanks



Bob's cam is basically a stock replacement that will pass tech for the Pure Stock drags, but it's a little different than stock. Build your engine to Pure Stock spec , either stock compression ratio as advertised by the factory or +1.5 as allowed by the current rules , though the PS guys would rather people build to factory spec.