[quickchange]

When using either ofsnyders heads CHECK , the copper felpro A gasket will overhang the combustion chamber in the valve area this may cause the engine to sound rough under acceleraion, NOW the felpro B gasket does not have this problem BUT on a 4" bore unlike the A gasket there is not much piston clearance ,
I also have one 6.1 snyder head here that was poorly machined with stud hole 1/2 a hole out ,this would place the head out of aligine on the block, I can put pictures up if you wish to support my claim, Im not getting at anyone just stating what i have & found , Derek in a cool NZ , Please keep the salt dry this year,