I am looking at a corvette numbers book that claims there were supposedly 4 engine codes for the 81 corvette. As I remember there is only one engine option L81 350 ci 190 hp what do the 4 codes represent ?? ZDA, ZDB, ZDC, ZDD
1981 Engine Codes
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Re: 1981 Engine Codes
John-----
ZDA= manual transmission, federal emissions
ZDB= automatic transmission, California emissions
ZDC= manual transmission, California emissions
ZDD= automatic transmission, federal emissions
The engines, as delivered from Flint engine, were configured for the 4 above applications. Thus, they were different assemblies and required different suffix codes to distinguish them.In Appreciation of John Hinckley- Top
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