I had an 82 Mirada many years ago sold it and now I am getting an 80 Mirada from my dad and going to put a 440 in it and have found alot of great info on here on doing that swap but I am looking at possibly using the 78070 hedman shorty headers as an option but when I searched that I found where a guy back in 2013 was asking the same question for is early 80's imperial and never got a response. Has anybody used these headers on these FMJ cars? If they wont work I was possibly going to use some 69 HP manifolds I have lying around.