There is some of it. Good chance those J heads have a lot more cc than the 318 heads would have had. If you used a head gasket thicker than factory tins, then you added more cc's. Therefore, you lose compression, which loses low end torque. I usually cut them about .040. You will be told by most that you have to cut the intake also. My experience in times past is I've never cut the intake face and NEVER had an issue. Also, couple that with your cam, and you have a 318 that doesn't want to come to life till 4000 rpms. Thus, your 2.36 60 ft
