I'm guessing its not easy to check huh....well I'm talking with a shop right now and they are suggesting to get rid of those heads and install vortec heads? With a mild cam ...so many people have different combos but I'm looking for something dependable and powerful ...I like how it runs now but don't know how dependable it would be so yes I will be taking it apart soon ..I have 5000 for motor and rearend etc....so how hard would it be to be in the low 12's- high 11's?? But streetable nice running cruiser if such a thing lol...thanks for the. Welcoming