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Engine decode

It's a 383. There should be a date above it, but I have seen with out. The -9 simply means it is the 9th revision of that particular casting.
See http://www.mymopar.com/index.php?pid=66
MM says: The block casting numbers for all RB, B, and LA engines are found on the left (driver) side of the block. In addition, on 1968 and later engines the numbers stamped on the lower rail of the engines right (passenger) side match the last 8 digits of the cars vehicle identification number.
Where did you find the #, on the pad under the distributor?
Here is another good read
http://www.440source.com/blockinfo.htm
 
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