Ive got a 1967 fairlane 390gta ive got hooker super comps headers for it but havnt installed them yet. the engine was re-built about 5 years ago and the mechanic at that time told me that these stock headers for this 390 breathe good, so i didnt install them at that time. just did the exhaust stright back to 3 chamber flowmasters. the bottom line is i bought the headers for them back then still have them, wanna install them but i heard they r a pain to install? if anyone has installed headers on a 390 gta ford fairlane and can help it would be greatly apprecaited.