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By Buzz - 3 Years Ago
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cleaning up this engine and found this stamped on the block... any help identifying or info let me know
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By DryLakesRacer - 3 Years Ago
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I’m guessing a personal stamping I’ve done it to a few blocks and heads..
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By MoonShadow - 3 Years Ago
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I would think its a reconditioned engine and the marks were put there then.
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By Ted - 3 Years Ago
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I’ll take a stab at this. The ‘3-72S’ is the original engine assembly date. That stamped assembly date should be in the same time frame and just after the block casting date. I find that many assembly dates are 3-5 days after the block casting dates. The ‘3’ designates the third shift. The ‘72S’ decodes as Feb 18, 1957 which would make the engine assembly taking place on a Monday. Not clear in the picture are any stampings after that date which should be the inspectors stamp.
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By Buzz - 3 Years Ago
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thanks Ted...all interesting information. The block has been deburred and the casting numbers aren't there anymore. The main caps are EBU .
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By PF Arcand - 3 Years Ago
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EBU indictes a 272-292 block I believe.. Seems odd as most "racing engines" in 57 would have been 312s. However. might be wrong on that.. ?
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By Ted - 3 Years Ago
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That Chivo Racing Engine stamping does raise some questions. That points to maybe some kind of Hispanic origin and that in turn could potentially have that engine originally being performance built in Southern California or one of the other western southern states including Texas. As James points out, this could have simply been a personal stamping but could have also been a small shops’ logo back in the day. The fact that ‘Engine’ is singular leads one to believe this was an individual building the engine rather than a shop and was just a one off stamping. If being built by an individual, a performance build could have simply been the addition of a performance camshaft with a balance job and some pop up pistons being thrown into the fray.
The exact year that block was stamped with ‘Chivo Racing Engine’ could have been anytime during the last sixty plus years and doubtful it was actually stamped in 1957 but some reasonable period after that. The Sixties and Seventies was that period of time when performance building a Y with performance attributes would have been fashionable.
Early on there were blocks with the smaller mains being align bored for the 312 crankshafts by machine shops so that’s something to check for on this particular block assuming this block has or had a 312 crankshaft in it. The current practice is to machine the 312 crankshafts to fit the 292 blocks rather than machine the blocks to fit a standard sized main 312 crankshaft. Beyond all that, it would be interesting to know more about the history of this particular engine and what ‘performance’ enhancements were actually found in this engine.
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By Buzz - 3 Years Ago
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so far the engine has been taken down to a short block. We found G heads with new valves, and what appeared to be a mildl port, the '57 intake was also ported with the center divider completely removed. We determined the block was 292+.20 the valley had also met with the grinder as it was "smoothed" and a coating applied. We couldn't identify the brand of pop up pistons and from the dabs of paint on the piston tops we felt the engine hasn't been fired since the pistons were installed. The crank had no dimple so probably not a 312 crank. At this point we found a buyer, so the engine will move on to next Y blocker. I will put up the pics I took after the teardown. thanks for the responses an interesting find all in all/
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By Buzz - 3 Years Ago
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Sorry I was only able to upload the one pic of the block. the message said I had exceeded my limit and wouldn't allow me to post more pictures
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