This thread is exactly like the calls I get (litterally) every other day from someone who wants to buy, or already bought, this "smokin deal" engine set and they are looking for parts. Without fail, it's a Soarer or a Chaser. Without fail, you will spend more money and a lot more time in the end then getting a Supra engine set or clip. There are vendors preying upon uninformed mk3 guys daily, selling them things they know will not work without additional parts they don't even have available. We know exactly what we are selling you, and we will not exaggerate or mislead you to make a sale.
Wiring a Soarer harness into a mk3? I could, but I still wouldn't want to. Every body connector on the inside and the outside of the firewall would need to be changed. The Soarer motor mounts will not work with the mk3. The Soarer clip/engine set always has an auto trans, and in the rare even it is a 5 speed (very rare), it will not work in your Supra because the shifter is extended back.