The Dart Swinger Special is 29xx lbs so add in 200+ for driver etc 3100/3200 lbs Add more for the 340 block. Not sure what a /6 weighs, which is the facrory engine. So maybe another 200 lbs. 3400 total. Had a 430 rear gear I was told. Probably a 275? I was told it made 412 to the wheels.
