Early a460 block and 4.75 crank

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Early a460 block and 4.75 crank

Post  powerstrokeace on May 11th 2014, 10:22 pm

Will there be any problems placing a crank in one of these blocks? I know where there one for sale and may make him an offer on it. I would put this in with a TFS A460 heads worked over my one of the Fourm member here

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Re: Early a460 block and 4.75 crank

Post  Wheelie58 on May 12th 2014, 12:05 am

I gotta check my notes, but as I recall..with an Oliver steel rod, you need to make a small notch at the bottom of the bores and one place on the pan rail.
Aluminum rods take more work.
More info tomorrow
Keith
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Re: Early a460 block and 4.75 crank

Post  powerstrokeace on May 12th 2014, 12:52 am

I have a set of olivers but they are 6.800. i'm thinking these maybe too long. not sure just started to think about this.

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Re: Early a460 block and 4.75 crank

Post  Wheelie58 on May 12th 2014, 7:46 am

Yeah...
Most of the 632/638 deals that we do are 6.7" rods..in a 10.3" block.
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Re: Early a460 block and 4.75 crank

Post  Wheelie58 on May 12th 2014, 10:14 am

Ok...memory is back.
Steel rods...small notching at bottom of the bores and a place or 2 on the pan rail.
Can be notched by hand with a die grinder. Aluminum rods take more work, usually in the mill.
Keith
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Re: Early a460 block and 4.75 crank

Post  powerstrokeace on October 6th 2015, 11:28 pm

well this is coming back up. need to get more info on where this need to be done. looks like this is where I'm going....

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Re: Early a460 block and 4.75 crank

Post  richter69 on October 7th 2015, 8:16 am

Im gonna be doin gbe same deal here pretty soon, with one of the latest production blocks, alum rod deal
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Re: Early a460 block and 4.75 crank

Post  gt350hr on October 7th 2015, 10:52 am

The 4.75/6.800 combination leaves a 1.125c/h for a 10.300 block height. With 1/16th rings the top ring could be .260 down, max. With .043 rings it could be .300 down. This could work if the valve pocket is "around" .200 deep.Not a great NOS design but "some" could be used. A flat top or dome would be the way to go. A dish would be out of the question as far as any significant volume.

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Re: Early a460 block and 4.75 crank

Post  kim on October 7th 2015, 11:21 am

6.7 rod 1.225 pin height?  Ring package?  Debating on staying with bottles or biting the bullet and just going turbo.

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Re: Early a460 block and 4.75 crank

Post  David Willingham on October 13th 2015, 10:31 pm

My 640 has a 6.835" aluminum rod. I had to do a little bit of grinding, but not too much.
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