Thanks for all the responses guys, I went with a yank converter. They were having a tax return sale so it was good timing for me. I went ahead and ordered a trans too, I think I burned something up in the stocker at the end of last summer. 4th and OD were acting weird so I said F it might as well do the trans while its on the lift. Just need to get it all tuned in and I'll be set.
4th is overdrive, i think you may be confusing converter lockup for overdrive?