As with any modifications even if they've been done a thousand times before with no problems there is always going to be that one were something is slightly different and there will be a problem that was unforseen. Case in point. I'm putting a GT40P into my 66. I'm finishing up the swap, I hope and believe my problem areas are done. I was planning to use headers, I have a set that will work but I knew in advance I would have some problems that would take time to resolve so my plan was to install the stock exhaust manifolds for now to get the car back on the road quickly. I literally had the P motor built up with all the accessories, hoses and belts, fuel pump so I could pull the old motor and stab in the new motor in a day. That was over 2 months ago and the car is still up on the jack stands. The issue I hadn't planned on was the exhaust manifold stud and the engine Z bar adapter bracket for roller cam motors won't work together. They both occupy the same space. That meant I had to install the headers and deal with all the little problems that popped up. It's taken this long because I'm only home on weekends. I finished the exhaust last weekend welding up the collectors and exhaust. The reason I said this was to show what can happen despite how much you plan something.
I've had a Fox Mustang with a cable. I had a 87 F250 that had a hydraulic clutch as well as my DD, a ZX2 as well as my 66 with mechanical. They all work well. The reason I'm happy and love the mechanical linkage in my 66 and another is happy with the cable or hydraulic is simple. We all picked the right system for our needs. The best I can say is sit down and think of any other mods you plan on such as headers and what type and if you plan on R&P. Don't make changes that you can't resolve issues with or keep the car from running due to time. Good luck.
Lol, I never really thought about my set up being massively over built. But I guess 22GT is right. The main reason I did it was that it was cheap and easy to make. It's durable, the Heim joints probably have less friction then the nylon bushings or at least that was what I was thinking. There's no slop, it nice and tight and works very smoothly. The Heim joints were about $14 each, the rod is 3/8" cold rolled steel rod from the hardware store. Special tools consisted of a hacksaw, file and 3/8x 16 die to cut the threads. My guess with all the materials, nuts and bolts, $80?
As far as flywheels go both the 157 tooth and 164 tooth use the same clutch kits I believe. The 164 tooth weighs around 40 pounds and the 157, about 22. I would be inclined to stick with the 157 tooth since most of the hardware for either the hydraulic or cable is designed for the 157 tooth bellhousing. Even the Z bar bracket for the roller conversion if down the road you plan on a 5.0 roller motor.