Should I go bigger u-joints

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D-Rock

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I have a 79 long bed that I'm rebuilding and I'm wondering if I need to go with bigger u-joints when I put it together. It has a 14 bolt ff and a Dana 60 front. 37 inch tires. I will be running 4.56 gears with Eaton Trutracs in both. I'm putting a big block in it with around 600hp, th400 and a NP205. Will the 1350 in the rear and 1310 in the front be enough or should I upgrade to 1410? I have to have new drivelines built anyway so if I need to go bigger now is the time. Just looking for opinions.
 
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I put all 1410’s in my Blazer, fork weak links! lol

That said, I ran 1350’s in my old truck with 44’s and never had an issue (4spd and auto).
 
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With that setup I would surely use 1410 joints front and rear.
 
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Ricko1966

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Here's a reason I wouldn’t,I learned a long time ago with performance automotive,there has to be a weak link. I pick cheap easy weak links. If you have enough traction and beat on it hard enough something has to break. A Ujoint is a lot cheaper than a diff.
 
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nvrenuf

nvrenuf

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I don’t agree with the weak link theory, over build it to begin with and that’s not a problem.
 
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Ricko1966

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nvrenuf said:
I don’t agree with the weak link theory, over build it to begin with and that’s not a problem.
Click to expand...
There is always a weak link,no matter how you build something. Build it so it doesn't have enough power or build it with limited traction. But something always has to be the weak link.
 
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D-Rock

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My weak link right now if I go with 1410 u-joints is the locking hubs on the front axle. They are MM 35 spline Dana 70 hubs. If I have something break on the rear end I probably deserve it. I also should have mentioned that I'm running Yukon chromoly axles with 35 spline outers in the Dana 60 front.
 
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