Below are revised tune-up procedures for the 1955 - 1957 Corvette equipped with eight cylinder engines. Although the information in this article is incorrect, we will leave it available for historical purposes.
NOTE: The following response is from Corvette Action Center Member JohnZ:
This article is WRONG, and contains instructions to set timing with the vacuum advance CONNECTED. A later supplement corrects the error and makes it clear that ‘55-‘57 V-8 timing is to be set with the vacuum advance DISCONNECTED.
Article ID: 1210
Created: May 9, 2015
Last Updated: May 31, 2015
Online URL: https://www.corvetteactioncenter.com/tech/knowledgebase/article/1955-1957-corvette-service-news-setting-v-8-timing-at-1-000-engine-rpm-discontinued-1210.html