Should I get a hydramatic transmission?

[1956cameo]

Hello everyone! Well I stumbled upon a guy that has a large supply of 55-59 chevy truck parts. He has many rare parts including 3 hydramatic transmissions. My question is this. Should I buy a hydramatic to put into my Cameo restoration, or should I just stick with a manual trans? I already have an automatic column for a 55-57 chevy truck, and he has the transmission and the torque converter, and flywheel. I would still need to find the linkage and the driveshaft yolk. Should I buy it and still look for the remaining items I dont have or just not bother? Granted if I buy it I won't have all of the parts but I will be closer than I am now to having a factory original auto trans set up for my 56 cameo.

Also can anyone post pics or give info on what the Hydramatics look like or how to tell what year one is? The trannys he has are kind of boxy looking. When I compared their looks to a hydramatic my parents have in their 54 GMC they looked very similiar. I am no hydramatic expert so I dont want to buy something that isn't what I thought it was. Any info on identifying Hydramatics will help. Pictures would be great as well.

Finally what would a hydramatic transmission with torque converter and flywheel be worth? I think what he is asking is fair, but I don't want to find out later I over paid.

Thanks for any input or advice in advance.