Quote:
Originally Posted by bigblockv6
Doesn't sound like an engine serial number, the correct engine ID number is below the front right bank cylinder head, thee is a machined boss were the number is stamped and the first 3 digits will be the displacement of the engine.
|
The numbers you supplied seems to be cast into the block as part numbers the 247 prefix is definitely a GMC part number of that era, like I mentioned previously the engine ID number is stamped. The numbers after the displacement may give a clue to what year it is. Lewis Matkin is the only one that can determine the ballpark figure of the year by those numbers. You may want to look at the intake and exhaust manifolds, there's dates cast on them that will also give you a ballpark figure on what year the engine is.