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Installing hardened seats is not costly. If you do it when you do a valve job it should cost less than $200. If you use B or C heads ask your shop to put the valve rotators from the 1970 and up 455 - this will help increase valve life.
The torquer manifold is a good choice.
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1966 Ninety Eight Convertible - 425 Tri-Carb, Factory Dual Exh, Switch-Pitch THM400, 3.54 Posi.
1966 Catalina Wagon - 421 Tri-Power, M21, 4.11 Saf-T-Trac, 8 Bolt Wheels
1989 IROC-Z - 5.7TPI
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