WHAT COMPUTER DO I NEED TO RUN A 350 IN MY 89 RS LO3 CAR AUTOMATIC.

 

You've already got the correct computer if you're staying with TBI. If not, sell the ecm to me first.
Tune your own eproms. If you're replacing the LO3 with an LO5 or relatively stock 350 with swirl heads and peanut cam, just have somebody like myself burn you an ANLU eprom and pop that in, if not, you could always ask Aaron92RS to burn you an eprom. He feels confident enough that there wouldn't be any liability issues.