i have did the following up grades to the 305 intake carb duals an gears an posi now im stuck with the cam i called comp an they told me the part number 12-120-2 with a duration of 218 an a lift of 454 i jus want a choppy sound an where i can drive it everyday to work an what are some other heads i can go wit the motor its a 305 an i dont want to go with the GM vortec