Go here and look at Page 5 and page 35.>>>> http://www.hetclub.org/burr/other/WaltMordent i'sTechTips-Vol1.pdf

J, an easy, quick reference we use. First, with the throttle pressure[ rod-to the trans]- disconnected from the throttle linkage at the bell-crank, verify the throttle is wide open, now check the gas pedal stop, located under the actual gas pedal inside the car, verify it is touching it. Now with the gas pedal wide open, stop adjusted, pull the transmission throttle pressure rod forward until it stops, then see how far off it is from lining up at the bell-crank. You might have to lengthen it or maybe shorten it. Slide the pin in. Now go drive the car, see how it shifts. With this procedure, you have set the throttle pressure to the MAX, from here you will want to make the rod longer, or back off the pressure, which will shorten the threaded rod sticking out the front . Set the throttle pressure to whatever shift point you chose. Remember, you must set the gas pedal throttle stop, IF YOU DON"T, it will use the throttle pressure rod as the the stop and probably strip the splined shaft inside the valve body. This is quit common to find. I hope this helps!

J2544 can be replaced by a drill bit (around 1/4 in if I remember right), and is important for setting carbs. I asked your same question re the other two tools, and Gus Sousa says not very important. Much more important to set up throttle rod as Doug advises and make adjustments as Gus advises. Failure or hesitation to shift, with harsh downshifts, suggests rod too short. Too early of shifts and rod is too long. Also note the pedal stop under the gas pedal is different for single carb vs twin H- make sure you start with the right one.
Dave

Dave:
How do I know if I have the correct stop for my twin H set-up?

J

Hope you have all the manuals:
http://www.hetclub.org/burr/manuals/1952-53_Hydra-Matic_Manual-Supplement.pdf

http://www.hetclub.org/burr/manuals/1950-1952Hyrda-MaticTransServiceManual.pdf

Richard:
Yes I do have those manuals. The supplement is the one that prompted my original question. I would also like to thank all that have responded your help is greatly appreciated.

Thanks

J Lombard

The incorrect single carb stop sticks 1.57 in above floor. My car is out getting upholstery, so I cannot give you the proper height, but I recall the dual carb post was shorter, allowing for further pedal travel. Someone here may know how much to trim the single carb post by to get the proper height.
Dave

I measured my stop at 1 1/4" above the floor. Does this seem right for a 308 dual carb?

J

Butterflys should be open all the way when someone pushes accler-pedal as far as it will go.
Have someone do that and look--should be straight up and down.
Shouldn't that work regardless~~~?

1 1/4 is definitely shorter. Do Richard's practical test and ensure you have full throttle travel and you should be fine.