Edelbrock 9266 Heat Insulator Gasket . if raising the carb .320 inches affects it. I don`t know what to say.
Intake runners? Your engine could be running hotter than it should cause the timing is off.
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~ BD.
"You won't find me in an old folks home" Pioneer Florida Cracker
1958 Apache Stepside
1958 Apache 1/2 ton Panel
1959 Apache 1/2 ton Panel