Art, Mike, let me recommend one more thing - go to Lowes and get you 4 100% stainless steel hose clamps. Get the 2~3" size. These will let you drill a small hole in them to fit over the brass nipple, but hold the sholder down onto the rubber boot. That specific size allows you to cut virtually all of the slotted portion off and gives a rust-free finish. I did that just as insurance that a backfire or lean-spit didn't turn my syncronizer nipples into projectiles or leave a hole there to draw air and burn a piston should the glue ever work loose and let the nipple come out. The cost - < $5 for all 4, the peace of mind - priceless. Take your time and plan better than I did so your screws are all hidden to the inside the first time (I thought about after I'd drilled and installed 3 of them and had to go back and buy more to do it all over again). Again, it's cheap insurance.
Notice the difference in the two pics - first without, second with the clamps.
On the cables, take your carbs to a bench and hook your cables up to be sure what's needed. The CR's are designed to accept the 6mm threaded cable that can be turned "into" the CR bracket. The 1974 cable has the right 6mm threads, but they are fixed to the cable and do not turn. Your 1972 cable may have a free-turning thread ferrell. I would not recommend putting the carb side on first and then installing at the handle simply because you've got to adjust the push/pull overlap. The drilling out of the threads for mine was very straightforward, just don't do it after they are installed (again I learned the hard way).

