Here's one for you gurus. Some time ago (about 1996) I purchased a '67 GTO project car and have had it tucked away until recently. While the body is out for blasting, I'm going thru the rest and have come up with mixed info from local sources regarding the engine. Obviously it is not original. It is a WS code block with a casting date code of H269. The heads are #12 with a casting date code of H079. Seems reasonable so far. Now the unusual stuff. The casting number of the block is 9799915. The numbers lists I have found on the web and in my books tell me it could be a RA III or in some cases a RA IV. However, the last digit of the casting number (5) is a stamp and not a part of the mold. It almost looks like it may have been ground down before it was stamped. I have yet to pull the pan to check to see if it has 4 bolt mains or not, but that will be soon. I'd be interested to hear any comments you might have on any aspect of the subject. Thanks for your time.