I would have to agree with Jeff Chambers. OTS cams from Ford Motorsport B303,F303,X303, and etc. were good in their day, but there are custom grinds and mass produced custom grinds that are now off the shelf cams you can buy that are dyno tested. Anderson Ford Motorsport has various stages of naturally aspirated to full blower cams. I have a friend who made 614rwhp with the AFM B-4 cam. This couldn't be accomplished with a X303.
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93 LX 331 cu.in. T Trim Canfields Stage III Richmond 6 speed
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