Re: 1972 SWB Build
From what a couple of driveshaft shops and the local hot rod shop told me, they need to match on the driveshaft. So if you run a 1410, I think it will only convert down to a 1350, not a 1310. So you'd have to find a 1310 to 1350 at the rear end. I don't know that they make a 1310 to 1350 conversion u-joint, but it would be worth looking into first. The shop I used to cut the driveshaft made it sound like the conversion u-joints weren't very common and I might want to buy an extra. I didn't because I'm fairly certain I'd lose it before I'd ever need it. But, still something to consider. Also, they did supply me with Spicer brand u-joints (good brand) so you might see if you can find a conversion u-joint from 1310 to 1350 before looking for a 6L90. Or consider having the pinion yoke changed to a 1350.
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