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Help with RD450 engine.

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I’m restoring a WWII International halftrack. The engine is in nice shape internally except for the pistons. They’re all torn up from pre-ignition. I’d like to remove the sleeves and run 4.5” pistons. Anyone done this, or know of a piston that will work? Jesse.





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  • 2 weeks later...

Might be easier to finda good running take out and drop it in. 501's aren't too hard to find either. But your engine has the desirable updraft carb. Neat old project!

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