Yep, tried to install 2 sets of them and sent them both back. Couldn't get them to fit at all. Hooker 6901's are what I use. Others use the Hedmans.
headers I used the hedmans, worked great on my 71 mav. even with aftermarket aluminum heads with the exhaust ports raised .250
im sure a little more time effort and research went into their fox body headers since thats a much more popular car. flowtechs are pretty cheap too. all the g-body ones i ever got fit fine