Code Breaker Help!
Thread Starter
Racer
Joined: Jan 2002
Posts: 293
Likes: 2
From: Warrensburg, MO
Code Breaker Help!
Any of you guys with the books and/or knowledge know what a HAH suffix on a 327 means? The engine code is T0406HAH. Google searching only gives me cynical laughs (hah, hah, hah) Thanks in advance.
Jimbo
Jimbo
Le Mans Master
Joined: Mar 2001
Posts: 6,640
Likes: 287
From: Ann Arbor Michigan
Only book I have is "Corvette by the numbers" and it doesn't list a "AH" code. According to the book, first letter is Assembly plant ("T"=Tonawada), next 2 numbers=Assembly day, next 2 numbers=Assembly month, Next letter=Motor division, and last 2 letters are suffix for "the intended application for that engine in the model year that it was built". 8 characters total. It does say that beginning in 1970 MY, the engine suffix code increased to 3 letter code. Based on this info, the engine must not be used in a Corvette. You'll need the book "Chevrolet by the numbers" to find out exactly what it was used in.
Last edited by Duke94; Jan 2, 2006 at 06:59 PM. Reason: typo
Race Director
Joined: Sep 2004
Posts: 11,874
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From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Team Owner
Joined: Jun 2000
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From: Southbound
Cruise-In II Veteran
Only Corvette big blocks were produced at Tonawanda. All the small blocks came from the Flint, Michigan engine assembly plant. Your Tonawanda small block is not a Corvette engine. My records do not list an HAH code, but HA indicates a 66-68 327 passenger car replacement block.
