[fiveohpatrol]

they use different flanges on the bottom side of the ragjoint. The splines coming out of the rack shaft are different size on the manual vs the power racks. You have a few options though. Flaming river makes an adapter flange that bolts to your stock shaft and allows you to use their manual rack or any the old manual steering mustang racks. You can also cut off the ragjoint all together and weld in a u-joint (also offered by flaming river, among others)
Or you could dish out the $180 for the full shaft.

Hope this helps,

-Drew