1974 Duster
Tonight I made up a 2.50" H pipe, added a factory weight to the back of the trans (from a 75 Dart) and changed out the speedo gear for the correct unit.
Car is MUCH (quieter) going down the road now and my butt dyno is telling me it picked up some power which is a big surprise to me. I honestly didn't think the H-pipe would make a difference with this combo but the car revs up faster in a notable manner.
Have a few odd rattles to address, maybe next weekend.