Welcome from SoCal!
I have a long-term '69 Dart project in process because of the memories I have of my '69 340 Swinger from too many years ago.
I'm also planning on 4.30 gears behind a 360 and a 200-4R overdrive trans. The 0.68 OD will make the 4.30 gears act like 2.92 gears when in OD.
Just a suggestion...
Several threads on FABO regarding use of a 200-4R. Check 'em out.
