Mounts pictured are JZA70.
LR-A = Left, Rear sump, A chassis (Supra)
RR-A = Right, Rear sump, A chassis (Supra).
The JZA70 pulsation dampener is smaller and bolts over the top of the engine mount, the JZX81 uses a filter on the side of the block, I haven't checked my JZZ30 engine to see what setup they have but I think its the same as the A70, the JZA80 I can't comment on as I haven't seen one.
It sounds like you're on the right track now to use a JZA70 pulsation dampener along with the JZA70 engine mount alloy brackets and your standard 89+ GA70/MA70/JZA70 rubber insulators so long as you have a 89+ crossmember (the one that comes factory with round oil filled rubber mounts instead of rectangular solid rubber ones) and it will drop straight in.
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