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post #1 of 5 (permalink) Old 08-08-08, 02:16 AM Thread Starter
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confused 460 crank pilot hole size???

Hi all
I find myself in a hard place as i am about to buy a stally for my big block c6
and know nothing about autos for stallys.
The thing i am trying to find out is about the -crank pilot size -
The stally i need comes in 2 sizes 1.375 - 1.848 and have know idea what i need or even what it means. I think it is the little stub on the stally that sits into the crank but am not sure and the company who i am going to buy it from has no idea as well.
the engine is a 460BB which i belive to be made somewhere between 70 - 74
the block number is D1VE-6015-A2B and the heads are D3VE-A2A.
If any body can help with this or even know what size i need it would be great.
Thanks

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post #2 of 5 (permalink) Old 08-09-08, 06:39 PM
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cool 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.

Paul


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post #3 of 5 (permalink) Old 08-09-08, 11:53 PM Thread Starter
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Re: 460 crank pilot hole size???

Thanks for the help paul
Just one more question
Do i measure the outside edge or the inner as the hole starts large
then tappers in to a smaller size. I wouldnt think the torque converter stub
would go all the way in to the back of the hole but im not sure.
Thanks again
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post #4 of 5 (permalink) Old 08-10-08, 09:22 PM
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cool Re: 460 crank pilot hole size???

Measure them both and see what the dimensions are of both ff them. One will obviously be one of the two pilot sizes.

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post #5 of 5 (permalink) Old 08-11-08, 02:30 AM Thread Starter
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Re: 460 crank pilot hole size???

Thanks again for all your help paul
All the best
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