Re: Small Block Chevy Stamp decode
I beleive the B means that there were more blocks produced than the original allottment of serial numbers for that plant. So B is the second or third (Can't recall if A was used) time around for the serial number that followed. In other words, lots of demand for replacement engines. High failure rate??
Note-These serial number not only included engines but also partial engines, fitted block etc. So it does not necessarily mean a complete engine was used. Original engine parts were often reused when in good condition. Things like heads, intake, oil pan, rocker covers, timing covers etc would be reused.
CE - Chevrolet Engine (warranty)
9 - Model year produced for
B - Serial number prefix
20558 - Flint Engine plant built this, they used serial number range 20000 to 49999
1966 Impala SS396
1970 Chevelle SS454
1972 El Camino SS350
1973 Chevelle SS350
1977 Monte Carlo
2002 Trans Am WS6