![]() ![]() It's conceivable that some confusion of procedure may have taken place at the service end. If youre looking at the engine code - this is already known. Another example: T0830CTY (T Tonawanda, 08 August, 30 30th day, CTY 1970 396 Camaro, 375 hp, 11. Small Block Chevy Suffix Codes: HR - TBS. Casting Date Example: E038 (E Month, 03 Day, 8 Last digit of model year (1978)). home name history competition hk ht hg hq hj hx hz vx identification models links email. Big block on the right side of engine above the oil pan rails. I would also be interested if anyone has information about the year code being for the model year or year of replacement? I know some GM documentation is recorded stating "model year" however I have seen CE blocks with vin# and year of replacement in the sequence. Small Block Chevy Casting Numbers Small block casting date is located on driver side rear of block on flange forward of bellhousing. I had been looking for information on the letter suffix code, I have seen "A" used before, and it certainly makes sense that it would be a repeat of the series for the plant sequential numbering system as the warranty sequence encompassed blocks for all GM models produced there. Only the number 4 was visible through the paint. I found mine on the verticle rough casting near the filter only after being hot tanked. It was not always done of course and at times relocated to other areas of the block and can be very light and undetectable under paint. The authorized GM dealers were supposed to document the block with the corresponding vin # by using the same conventional gang stamp as the factory would use. Small block chevy stamped numbers small block chevy engine casting. Below well break down the ID codes prefix and suffix sections. V8 engine codes are stamped on a pad forward of the cylinder head on the passenger side of the block. ![]() Just for conversation sake I would like to add that warranty replacement blocks were still under warranty by GM for the remainder of the initial purchase gaurantee period. 1970 396 casting date B 6 70 for February 6, 1970. ![]()
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