That is NOT a LT deck. That sure looks like a 44C, which WILL attach to your garden tractor with the proper mule drive and hangar assembly. However, the PTO pulley sizes may not exactly work as engineered.
THANKS for the information, such a simple thing as hanging a mower deck has been humbling to say the least. I'll get out again this weekend and see what I can make work, have several mule drives to try. Greatly appreciate your contribution!