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zjautoparts aswell abstinent the adherence of the valves with the banal beehive springs, higher-rate PSI beehive springs, and dual-coil springs. The beehive architecture accepted to be the a lot of abiding at top rpm.
13 The animation of anniversary valve on the valve bench was abstinent and compared with the baseline test.
A good example, custom valve covers were amongst the most popular dress-up items introduced by speed equipment companies. In the July 1955 edition of Hot Rod, Racer Brown wrote an article titled “Bolt On 83 Easy Horsepower,” featuring a 265 with three deuces on an Edelbrock intake manifold and Edelbrock’s new, finned-aluminum valve covers.
Even Chevrolet got into the act when it introduced special finned-aluminum valve covers for the first year in a V-8 ’55 Corvette. At first, the Corvette valve covers had nine fins and then went to seven. Take a look at the valve cover gasket shown here and you’ll notice a dual bolthole pattern that provides a 1955-’59 staggered pattern and a 1960-up even bolt pattern.
The Main nozzle to an even bolt pattern meant aftermarket specialty manufacturers had to slightly retool existing molds. Notice on the Cal Custom finned-aluminum valve covers the extended wing nuts look great thanks to even bolthole, spacing.
