I've had the heads off before and they are the 4 valve relief flat top pistons. The reason I'm doing all this is because I'm goin g to be pulling the motor this winter to regasket it and paint it up and the engine bay, so I was wanting to port the tbi heads to help flow but then I remembered I had some 601 heads so I thought I wood ask what everyone thought. I'm leaning more toward the 601 heads real hard right now, I want it to be a good torque motor
