auto to manual swap how hard? how many hours

I kind of agree with 1968FormulaS340. I had a friend who did it & he had both cars side by side. A 67 auto trans Barracuda & a 69 4 speed Barracuda. I don't think it took him all that long as it's mainly a bolt in except for the floor hump, BUT he was mechanically inclined & determined to do it. When I was younger I wouldn't have been afraid to try it myself if I had both cars together so I was sure to have EVERY LITTLE PART necessary, including the pedal assembly under the dash & the brace for the ball stud on the body, all of the linkage for the clutch, the CORRECT flywheel for the engine, etc. I think I'm too old for it now. I would hate to think what a shop would charge for the work.