my 51 panel 2x4 has a 351w in it when i built this motor i did some research into heads etc. It has been 15years but i still recall that the 351 heads had bigger chambers so to use them with a 302 required domed pistons to regain the compression the only reason to change was the valve size. the highest compression heads were the c9oz castings which were the first year and came on the 4bbl version which was only the first year. they came out with 4bbl versions in the eightys but that first year engine was used in some shelbys etc it also used special pistons which are still avaliable and the cam requires a different fireing order which is actualy a smoother running setup.
jeff in the UP
