Cool, I the 2 big trucks with hydramatics I've seen ran PTOs ran off the transfer case or brownie transmission.

There is a farmer near here with a GMC military truck with a hydramatic that has a hydraulic winch running of the transfercase PTO.

The GMC dump that I have been trying to buy with a 302 and hydramatic has a 2 speed auxiliary trans with PTO that the hydraulic dump runs off.