The most powerful cars I ever owned were my GTX's and Coronet R/T's 4spd trac-pack cars. The 69 440 six packs were the ultimate off the show room floor. The most fun to pull gears with were the 65-66 GTO's and the 67-69 firebirds. Those close ratio munci transmissions were like shifting a dirt bike. The engines and 10 bolt rears just couldn't take the abuse like a mopars.