1961 Pontiac Catalina - Twin Turbo Tarmac Terror
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During a tuning session we get a sneak peek at what lives under the valve covers. For this application Marty employed 1.65:1 ratio Lunati roller rockers. The rods are top of the line Smith Brothers and the valve springs feature 230 pounds seat pressure and 725 pounds at full lift. A bar-type Ridgeway stud girdle uses two 1/2-in. pieces of aluminum to clamp the studs. View Related Article
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