I only recommend one engine builder for Supras:
Bryan Malloof Racing
(706) 839-1550
1316 Robertson Loop Road,
Clarkesville, GA 30523
Bryan built my NDRA racing motors, and the vast majority of our high horsepower bottom ends for the street.
The last track motor he built for us ran a full season and a half without ever being taken apart. That is incredible durability at 40 psi running 7 second runs.
He is by far, the absolute best machinist I have ever worked with. I've been building and racing cars for 24 years, and I've worked with some of the best in the business. This guy is by far an artist when it comes to building motors.
It's more than worth the shipping costs to get that motor to him and have him build it for you.