Quote:
Originally Posted by pmrphil
Stock valve angle in a small block Ford is 20 degree VALVE angle - relative to the deck/cylinder head surface. ANY valve and seat angle(s) for a valve job are permitted.
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Phil, So you believe that the stock valve angle + or - means you can't re-bore the valve guide hole at a different angle, face off the spring seat to match, change the the valve job sealing angle or possibly install new seats ,at the new angle, and then possibly modify the combustion chamber, which is already illegal? How much could you actually move the valve angle in the head and get away with it? Remember , the approved Stock replacement pistons have to have the valve reliefs at the original angle and depth.
Okay then , if that's what it now means. But it's not what it used to mean, and I go back over 50 years with S/SS tear downs. ;-)