TA49 w/ Garrett housing is the way to go because of the exhaust housing in your case. Anything else will spool slow like Bison noted with the stock converter. I don't really agree with the "you will grow into it" statement from other members. Because you will be SORRY till you do.
Bison and Otto's posted a "Bigger is not always better" DYNO thread that was the useful information concerning a turbo comparison for our cars to date imo. The test was on a stock shortblock TR with minor ported irons, stock valves, with a 212 cam. Brian's 61 that had the Garrett housing, showed the best power curve on first initial tests, noted on the first page of the Dyno test over the turbo's w/ PTE .63 housing. As I followed the thread, it seemed like the use of the smaller exhaust housing was the most important key of the whole thread since most turbo's were within 1% of each other on a stock motored car + bolt on's.
In this post I never posted that the Garrett housing was better than the PTE .63 on a aluminum headed car, non stock motored TR/GN.