Okay you can use the frame mount and if you have the mounts from the musang 5.0 L you can use those just swap sides and drill new holes or weld them in to place. For the tranny mount yes you are going to have to build a cross member for your tranny. I can help you with most of what you need. If you want pm me your number and we can talk.
here is a pick of the tranny cross memeber mounted to the frame in existing holes that are already treaded and ready to be bolted to the only difference between this mount and the one for the ford motor is there is 2 holes for the tranny instead of one.