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Hello all I'm hoping someone can help me I am trying to identify what size the piston I have pulled out of the DT I am restoring is so I can purchase a new one.

The only markings I can see are 6-34 & 96 7.

Here is picture of old piston, as you can see it has small grove on outer edge and I don't want to re-use.

Please help!

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There is 6-34 just under arrow then 96 7 is stamped about an inch under that, very hard to see on picture.

I am just trying to identify whether standard or no, however, I have order a bore measuring tool off eBay so I can see if piston has been bored.

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  • 3 weeks later...

Hi Afool " missed this, Standard is 634.[ 70mm] :jossun: Look at F,A.Q"s to see how to post pictures,

If they"ve been bored, they only have an arrow at front & 25/50/75- or 1.00 at the rear of piston crown, [ that's on N.O.S. pistons,] aftermarket may be different,,

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