Gents- I am eyeing a 1972 396 (402) Camaro that is bone stock. What options do I have in terms of bolt on aluminum heads? I want to shave weight up front, and that alone with an aluminum intake will shave a bunch. I am guessing maybe more than 40 LBS combined. But I do not know what stock pistons came in a 1972 402? Are they domed or flat tops? The short block is solid, so I was looking for some heads that might raise the compression slightly, save weight, while flowing better. But I don't know where to start in terms of making sure I have good piston to head clearance. From what I have read, stock 1972 heads were either 105 or 110 cc, but their shape can be very different on an aftermarket head. I would rather simply change heads and intake, (and any necessary valve train items) as I want to leave the crank and pistons alone. Any suggestions much appreciated!