Two thoughts:
(1) A "pro" would NEVER pay any attention to the markings on the jet without actually checking the orifice size; as many enthusiasts drill out the jets. Nor would he/she consider using the old jet. A "pro" would determine the correct jet for the carb and install a new one.
(2) The original jet in the Rochester B used from 1954~1959 on the 261 was 0.064, not 0.053. There is a "wee" bit of difference
However, reread Denny's post. A 64 in a 235 carb is too much. So if the carb is a 235, and you failed to tell him it was for a 261, he/she may have done the correct thing.
Jon.
