68FirebirdWaState... IF... I were going to do a swap, I'd weigh the cost, time and effort... and would end up with a TH350 as it should be the most direct swap for your application if you have the 2 speed.
Although... I do have an ST300 sitting here you could have for Free if you need it. I won't be using it, and if it comes to that.. you could give it a shot, and it wouldn't cost you anything but time and about a half hour drive each way!
Just let me know, and I may be able to help you trac down a TH350 if you decide to go that route? I have lots of Firebird and GTO friends all over the area here!
Welcome to the list!
Brett - 67 Drop Top 455! brettnheather@hotmail.com (feel free to contact me directly)