Reply to "Engine numbers"

I went back & re-read AJ's first post. He wrote the number OL5G is STAMPED on the FRONT of the block. The date code I was referring to is CAST into the block on the side facing downward. So OL5G is not the date code. I apologize for misleading you AJ. I have no idea why OL5G is stamped on the block.

Doug, we've covered this ground before. All of the blocks produced in the US between 1972 and 1974 were casting number D2AE-CA blocks, both 2V & 4V, 2 bolt mains & 4 bolt mains. And yes, all the blocks produced in Australia, between 1972 and 1982 had the same casting number.

From reports I've received from folks who have purchased run of the mill Australian blocks (not the NASCAR block) I have come to believe that they indeed do have a better metalurgy, as the cylinders do not develop a taper or a ridge at the top, and it gives the machine shops fits if you ask them to bore one.

The mint marks are found on the little bit of block back where the oil pressure sender screws in, the US blocks have a "large-C small-F" symbol cast in that location for Cleveland Foundry, the Australian blocks have the letters GF cast in that location for Geelong Foundry.

cowboy from hell