Before I built the current 347, I had a 289 in a 66 coup that ran 12.84. The motor was very mild with dead stock 289 heads, crower solid cam .512 lift
[email protected], F4B edelbrock, 650 DP Holley and long tube 1.5 primary headers. The trick was the drive train The car ran 14.8's with stock 2.8 rear...