So, as far as I know Descendant was the only company to make a kit for the 2ar-fe swap into first gen Tc's. The 2az and 2ar are completely different in all aspects and are not plug and play swaps. I think the best and easiest route to take would be getting a turbo kit for your 2az from turbokits.com, they have multiple kits available which are pretty much bolt on kits. You would make more power right off with boosting it. I have been slowly doing work to my 15 tc getting it ready for boost and have seen very marginal gains, maybe like 30 hp and 40 tq. I would begin with that and then do a 6-speed auto swap from an 11+ Tc as they are a direct bolt up to the first gen motors.
Link for turbo kits.