Making horsepower at Chrysler in the early 1960s was nothing new for the Pentastar brand. The 413 RB engine had been producing more than 350 hp since the late 1950s. Joining the lineup in 1963, the 426 Wedge doubled down on the fact that Chrysler was all-in on going fast. The one weakness holding them back from total domination on the streets and strips was with their dated and tired manual shifter, the BorgWarner T-10 transmission. That all changed with the advent of its replacement, the New...