As Oldsmaniac said "after-market Headers" are NOT an option unless you are a Die-hard Olds nut. My Brother, Nephew and I like the B(big)Bodies. We did put G-Body 455 headers on his 67 Delta 88 Custom, a "little" modification" was required. Do away with the rear steering box, put a rack & pinion from a Capri, Mustang II won't work, they are different, one header tube goes out-side drivers' frame rail and frame was notched. It is a "streetable" but drag=race only car. I take Toro exhaust headers,cut them. rotate 180 degrees and Ni-weld, very good flowing "factory" header. My 67 LS 98 has this system, 4680# and runs 14:18 @ 100 miles per hour. #3 option, this is your EASIEST choice. Factory drivers-side, decent flowing but there is some "roundy-roundy" but not a bad price. Good Luck, Ken
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