I read that you were running a 350, and you are on the right path to making decent power with it. You mght want to think about a different trans if you intend to put a 461 in your car. I have broken a ST10, M20 and an M21 with mild 455s. It will live a long time behind the 350 if you take good care of it. I went automatic because it only costs me $200 to rebuild one of those, and $400 minimum for a manual, plus the auto lives longer with lots of torque.
Got any pics of your car? You should post them up. Always wanted a first gen bird, make mine a 69.