Hi,all any one know if the aussie heads are really good or not 4v.for the 351 cleveland motor.As i have a 72 with 2v with street dominator intake for 4 barrel with a 600 holley carb.I have a couple of friend with the 4v heads and 4 barrel carbs but their cars are slower than mine.My car has alot of power in 1st and 2nd gear but a dog in drive.I know my car is a 72 mach1 its suppose to have a fmx transmission and a 2;75 raer but you feel all rear when driving at 65 mph.Anyone have any suggestions.