I think I found it.
Old post from @Jeff Lange
Copy paste from Supraforums:
https://www.supraforums.com/threads/r-154-vs-a340e.629561/#post-8305713
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The A340E used 4.30:1 on N/A's, 3.91:1 on 87-88 Turbos and 3.73:1 on the 89-92 Turbos, so yes Toyota did match the...