Just to let you know.

A full (USDM Supra) 2JZGTE isn't a straight drop in like most people think. It's a lot of wiring work, custom driveshaft, engine mount, + many other things to make it work. Only a handful of guys went thing route.

Now a (JDM Aristo) 2JZGTE bolts in fine, but still the wiring get pretty complicated...

1JZGTE swap on an IS... Never seen or heard about.


**Most popular and and common thing is going NA-T. Changing the bottom end to a GTE one + turbo kit from a company**
Some companies well known amongst IS community:
PFS, SRT, TurboEast, + others.

If you are really interested in an IS, I would suggest going to IS.net and search around. Now if you want to expand and research other models, i.e. SC300 or 1st gen GS300 than I would recommend going through clublexus for information (2JZ/1JZ-GTE swaps are more common on those models).