My 1974 Plymouth Duster 340. The fresh 340 install is complete. The 340 runs great and I’ve put around 200 miles on it over the past few days. 1968 340 Wedge with Keith Black Pistons, 4.070 bore, 2.02 intake valve J Heads, Crane Energizer cam, Headman Headers, and Flowmaster 40 series mufflers. 8 3/4 rear with 3:23 gears.