Re: 460 crank pilot hole size???
I think they were 1.85 and then went to 1.375. Ths split is somewhere around 1972-1973 maybe. More specifically, you'll need to look at the crankshaft casting number. I think that 2Y and 2YA and 2YAB casting number 460 cranks were the first size and then the 2YABC's were the 1.375 size, but the change might have been after 2YA. I am not positive on the time of split because I run boats (no torque converter)...best to measure the pilot on your crank because "between 70-74" is where the crank pilot diameter split lies.
The crankshaft casting number is located on the leading or trailing edge of the third counterweight from the snout.
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