"I thought Cletis just put the duel cylinder on his. Maybe, that would keep the cab floor opening in the same/right place." I used the dual cylinder w/o power on my '56. The hole in the floor doesn't allow access to the reservoir. I used the
little bottle that came with the CPP kit I bought for the '54. To check the fluid you have to climb under the truck with an inspection mirror. This isn't something you have to do everyday or even every month so I'm not concerned.
Bigblue29, the kit you linked to is most likely the CPP kit I used on the '54. As you say it is a mostly bolt on job but I ran into a few problems. You can check them out
here. Click on "Front Suspension".