I can't help...I'm a newbie to this but I know I'll be doing the same thing when I put in my brownie box. Why don't you measure it and match it with Spicer by dimension? They asked me for the OD of the splined shaft, the distance from the end of the splines to where it bottoms out in the bearing and spline count. It might be different for a slip yoke I guess. Either that or you could grab a like yoke from a wrecking yard that fits? Couple ideas....