Any of those will work. If you intend to use a RedLine product, MTL seems to be the lubricant of choice of most in this group. The Ford synthetic MTX oil will also work exceptionally well but you will probably want to add some friction modifier.
In short, any of the several products posted in the past for use in the MTX-75 will work fine and will be compatable with your LSD.
A short history. Ford used ATF in this trans for several years. Perhaps starting with type F but definitely using Mercon from 96 to early 00. In early 00 Ford started using a synthetic GL 4 gear oil and said that it was manditory for use in the transmissions that it was orignially installed in and was preferred for both topping off and refilling all MTX-75 transmissions.
Adding friction modifier to normal ATF helps the synchros to wipe the oil off better and greatly improves overall shift quality. Somewhere along the way, someone tried Mobil 1 ATF (which happens to meet Mercon specs) with friction modifier and discovered that synthetic oil was beneficial.
It was also discovered that the Chrysler spec ATF+3 has a much higher level of friction modifier to start with and works well without adding friction modifier.
Of the RedLine products you listed, some or more the consistency of ATF, and some are slightly more viscous like Ford's new synthetic MTX fluid. It is felt that MTL has enough friction modifier to start with that no additional is needed, but that MT90 might need additional friction modifier.
One poster has recommended an initial fill of ATF+3 and draining it in 500 to 1000 miles and then installing the synthetic lubricant of your choice.
What do I have in mine? Ford synthetic + friction modifier. It works very well. I don't have an LSD unit though.
