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1999 S10 with Gen I 350 W/Tri Power and Muncie M20 swap still in progress.
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Hi to all I'm a newbie here. I have a 99 S10 with a 1969 4 bolt main 350 and Offenhauser Tri power set up in the truck now.. I replaced the automatic transmission with a M20 Muncie what length drive shaft do I need to use to make this work the automatic drive is to short. Thanks for the help
 

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Randy
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617 Posts
This not something that everybody will know off hand. it's a custom set up. Your going to have to mock up the driveshaft you have and measure how much longer it will need to be. center of u joint to center of the u joint location at the rear end. It's not hard but can be a bit intimidating at first. measure 3 times and have it built. A driveshaft shop can help with the the how to measure if needed.

Just keep in mind that the slip yoke must have 3/4"-1" slip before bottoming out on the output shaft.
 
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