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Elmariachi ... to answer your earlier question ... I`m running two heavy silver springs at Don`s suggestion . He said the lighter ones sometimes cause the timing to not come back fully to the base setting .... and also sometimes bring the advance in at idle ( not good ) .
Sorry for the delayed response ... I was out of town yesterday .
I believe someone mentioned dual pattern cams ( Excaliber ? ) . I used to run nothing but dual patterns on my race engines and still do on my 427 Galaxie . Reason was that Ford exhaust ports flowed much less than the intake and couldn`t really be opened up enough . Since most of us are now running E brock heads , that may not be a problem now . The only way to tell is to put the head AND the intake on a flow bench . I used to do that and then worked with my cam grinder ( Schneider ) who would come up with a grind for my particular application . I would give anyone exact cam specs if they asked , but it did them no good as it was optimized for my engine only .
Bob
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