sup homie's just need some advice on what size pumpheads I will need to hit back bumper. I have an 84 cutty with a 350 sbc. I am running 3 gates, 2 to the front and 1 to the ass. I I got 8 in strokes in front and 12's to the rear. I am running 8 batts with italian dumps. extended a- arms and reinforcement on the frame. I was told to get #11's and others say #9's. What's the difference. What size springs should I get. Any help would be greatly appreciated.