I am trying to find some sort of parking brake that I can attach to the rear of my Roadranger RTO-6613 transmission. Never available with a transmission mounted parking brake, as far as I have been able to tell.
I would like to find some sort of mechanical disc caliper, or a spring set air released caliper.
I need something bigger and stronger than an ordinary hydraulic caliper with provisions for a manual parking brake.
Can you think of some sort of equipment, or vehicle that may have something like this that I could addapt?
I don't have any problems putting stuff together and making things work, I just have not seen the pieces I need so I can put them together yet.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-