Throttle Body Sizes
 

Ok guys im over 400 ibs/ft torque but only liek aroudn 350 horses. I want horseys now super bad. Im changing my intake and my throttle body. I have a 70 MM and the edelbrock RPM intake right now but i also have 351 heads on it. I was wondering soon i ge thte 351 perfromer intake? Will that even fit? ALso sohould ui upgrade to teh 75 MM? ive also seen odd numbers such as 76mm and 73. Im planning on putting a super charger or possible a turbo to just be diffrent. All thoughts are appreciated. THanks fellas