hey thanks for all the help, are the edelbroke aluminum heads for the 390 are they low, medium or high rise. Also are the tri-power intakes low, medium or high rise? The car I am putting this in is a 67' ranchero. lastly what range would the horsepower and torque be, the engine has the stock bottom end, edelbroke heads, edelbroke RPM cam and soon the ford tri-power intake?