As some of you know i did the 351w swap. Well it's running fine killer power and pulls like no tomorrow! But i was just thinking the other day,and my block is 40 over and i got the fel pro 1011-1 head gaskets. Is the bore ok for a 40 over block?I didnt even think to check this to see if they were the same diameter as the cylinders when i installed them or if they overlapped the cylinders. Also anyone know what the diffrence is between the 1011-1's and the 1011-2's head gaskets by fel pro? peace