I was looking at purchasing a set of FRPP GT40-P cylinder heads but quickly realized I might have some big header issues. I have a 64' fairlane and as some of you might know, good fitting headers are few and far between. To my knowledge only one header fits, Hooker Super Comp's Pt. #6134. Does anyone know if these headers will clear the offset spark plugs on these heads? If not is it the same story with spark plug location on the GT40-X head or should I go looking for a comparibly priced TFS of E-Brock set of heads? I appreciate any help!