Hi everyone its been almost a year now since I got my 96 thunderbird (stock 4.6 V8) always been a fan! I'm not at all a mechanic hopefully with your guy's help I can learn something here! So far I've done some light body work and paint.. no major motor work yet I've noticed I have a leak in the intake manifold which might just be a gasket problem but I've done some light reading on a pi intake which can be done with or without pi heads? I was wondering if anyone can help me understand more to this modification? Could these newer pi heads bolt onto the existing block? Thanks guys!