Re: 1965 original L78s ?
Stanley,
I have 2 early blocks that were decked, but I looked at them today and some of the stampings are still ledgible. The B-4-5 block had a Tonawanda code of T0305IX (X stamped separately) on the right hand side of the pad and a sloppy Chevelle Vin like in Alan Colvin's picture. The other block was a B-20-5 and only the first three number of a Corvette VIN , 511 were ledgible, but they were on the right side of the pad like yours so the Tonawanda stamp must have been on the left.
The change of the Tonawanda stamp from the right side to the left side of the pad must have occurred between March 19 (Colvin's picture) and March 24 (your engine). I would say that any engines March 19 or earlier with the Tonawanda stamp on the left didn't get that way at the factory. I sure wish the rest of the numbers on my B-20-5 block had been readable.
Stanley,
I have 2 early blocks that were decked, but I looked at them today and some of the stampings are still ledgible. The B-4-5 block had a Tonawanda code of T0305IX (X stamped separately) on the right hand side of the pad and a sloppy Chevelle Vin like in Alan Colvin's picture. The other block was a B-20-5 and only the first three number of a Corvette VIN , 511 were ledgible, but they were on the right side of the pad like yours so the Tonawanda stamp must have been on the left.
The change of the Tonawanda stamp from the right side to the left side of the pad must have occurred between March 19 (Colvin's picture) and March 24 (your engine). I would say that any engines March 19 or earlier with the Tonawanda stamp on the left didn't get that way at the factory. I sure wish the rest of the numbers on my B-20-5 block had been readable.
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