I hate to tell you this, but your head/piston combination is screwing things up. You need to change one or the other to get things right. My choice would be to sell the heads. You need to find some aluminum heads with 72 or 76cc chambers to get your compression down. Then you could run a smaller cam and a dual plane manifold get get it more street friendly and to get the DCR within pump gas parameters. There is no band-aide fix here.