The 3T-GTE was only ever sold in Japan, so the full engine manual is only in Japanese. It won't bem uch help to you. From memory the timing is set to 12 BTDC from the factory, there is a notch in the pullet that shows this mark so you can't go wrong.
Standard boost is 6.9psi, the fuel enrichment is set for just over 2 psi and the vacuum switch for the knock ocntrol unit is to ensure that the unit doesn't operate under vacuum or cruising conditions. Cam timing is set the same as the 2TG, have to check the valve clearance but I think they are the same as the 2TG as well.
Best thing is to use the 2TG manual which you could still buy new from Toyota last time I checked.
I also have the full factory wiring diagram for the 3T GTE as well. Its on my site together with some other info that may be useful to you.