Pretty impressed with the snows on the Challenger. Traction is excellent, wet grip is very good. Noise is less than I expected. Main limiting factor of the car now is the very low ride height.
Probably because the earlier 340s absolutely ripped. (I recall the NHRA factored one 60HP over the rating.) 1968 (only) 4-speeds got a big cam, and 1970 used the J heads, big carb, and high compression.