For Patrick, it's probably been a matter of "making enough" on them. He probably can't buy them cheap enough from Offenhauser to sell them competively and make the margin of profit he "needs" to make. Remember, too, that he already makes and sells the Wayne valve cover and Wayne side cover, which has been a very good seller for him. On top of that, talk is that he may be getting ready to move on making a reproduction Fenton valve cover to go with his Fenton line of products, headers and intakes.
Joe
