hardway,lots of good advice above.personally i would take it all,check for the leaks, get a tt chip,but most of all get a good converter.the precision housings flow more but don't spool as well,the 212 softens the bottum end up as well,you need the converter to makeup what you have softened up.
My car will slow down if the rpm drops below about 4800 on shifts with the 212/212. Ideally it wants to be at 5000 on shifts and pulls hardest between 5000 and 5500. I have the smaller 212 grind. The trans shifts at 5900.