So my 745T decided to totally die on me last week, went to take off, gave it a full throttle, and a mild backfire later and all the power was gone.

It's done this briefly before, just gone into what feels like limp home mode for a while, bringing me to a halt, but then fixed itself.
But this time, it's fully stuck in dead mode, the car will idle ok, a little rough and looks a touch rich, but it won't make enough power to really get moving.

Anything more than just gentle throttle in park and it will cough and try and stall, it will rev just a tiny bit in park if you roll on the throttle a little, but in drive your accelerating about as fast as bicycle.

If you try and just floor it to make power, it just coughs and backfires a bit.

Current thinking is AMM, but I'm looking for possible alternatives, just in case it's not, I found one source listing almost my exact problem as AMM, but another quoting that the car should not run or idle if it is the AMM?
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Wagon Power, My 88 745 Turbo