| i got mine used .. a 3550 with a 23 spline input
.. i think it needs syncros.
But,, I think you will find that changing yokes causes a driveshaft imbalance. I got a real bad vibration after the swap. Looks like the previous owner had similar probs bc the yoke is showing signs of wear and has some vertical movement in the tailhousing bushing.
Don't do it on the ground like I did if its avoidable.
__________________ 89rs w/a 400, some aluminum things, a tremec, 9inch-4.10 gear mods
and it sounds like this idle.MPG | 
