Good point. Traction is an important factor in the quarter mile. Does the 67 with factory traction bars hook up better than the 68 and 69 without?
Having owned both(stock factory) at the same time(77-83), i can say definitely yes. 67(40k miles) 400-4 spd/3.36's got much better traction then my 68(68k miles)-400 a/t-3.23's. The 67 would pull clear over center line dump'n the clutch off the line though. Leave tire marks though 1st, some 2nd and 3rd, and chirp 4th. The 68 just smoked the tires. Both had G60-14 goodyears.
