You have the weight, horsepower and flow necessary to run the hoe. Precisely manufacturing the mount brackets and attaching them to the frame of your JD is the part that would worry me. Also the L35s seat spins around to use the hoe, you would want to make your JD seat spin.
If your custom mount brackets failed while the hoe was under stress the results could be disasterous.
Personally I would look for a JD hoe.