2" bar goes into main saddles using 2 spacers, one in #1 bore, one in #5 bore. Cam tunnel bar goes in cam, with 2 cam bearings installed, on #1 and #5.. There is a vertical slot, that will align with a slot on the cam tunnel fixture. A spacer goes on the end of the cam tunnel bar, then you side the front plate up against it all. The yoke will need to be " spread" with two allen bolts to open it for slip fit.Plates slide on, yoked pate to the front flat plate on rear. There is a flat washer and bolt that will bolt to front plate/cam mandrel.There are two 3/8" pipe nipples that will then be hand snugged, until they touch the block. Insert bolts into those two nipples and snug up. Tighten the yoke back up.Everything should now be tight, rear plate just along for the ride, until top register plate is attached.Top reamer guide plate will attach correctly, one way only with two allen bolts, over dowel pins in the flat of the front and rear plates.The alignment plate can only go one way and work. You will know immediately if you have the angles feet wrong, which set on the front and rear plates. The indexing to the lifter bores will be way way off. When set up properly, the reamer should slip right down and pilot itself on the tops of the lifter bores. Again, you will know when its right. It takes more time, but I highly recommend using a finish reamer after the bushings are installed. Makes the honing job way way easier. The job " can" be done on a Bridgeport, but its a lot easier on a large seat and guide machine. You will have to determine where you want oil holes in your lifter bushings, and the length of the bushing 1.500, 1600 or 1750, depending on block and preference.