So, the block is a 3970010, the casting date is H 26 9, the vehicle build date is
10D (early 69 z28). So the block's casting date is not prior to the build date of the car.
He also gave me some additional build dates, the close ratio 4 speed muncie is dated P9M31
(august 31), water pump dated H 27 8 (August 27, 1968), cylinder heads I188
(september 18, 1968) and I208 (september 20, 1968), alternator 8 J 28 (September 28, 1968).
Wow, so I can really see what may of happend. The original owner blows up the engine takes it
to the dealer, the dealer installs a replacement CE short block (guessing of course). The orignial
components get reinstalled and all are dated around the build date of the car. The only out of
date component is the new CE block.
Continuing, the original owner then takes possession of the car again blows up the engine again,
but this time he fixes it. That's why the engine pad has no numbers, they were removed during the
rebuild process. But, the numbers by the starter pad as you say points to a CE block. Gee,
does that sound plausible.
Pat, another quick follow up question. If the above is correct then original engines do not have
any stampings by the starter pad because the tracing numbers were either at the engine pad
or oil filter housing.
And would the replacement CE blocks for 302 still use the problematic full floating writst pins
or would chevrolet have decided to use pressed pins to avoid future engine failures.