On a BB into an A Body the "Shumi's" are the only header that I'm aware of that will drop down from above and bolt to the engine without cutting holes any where or dropping the steering linkage or capture the starter or hanging so low that loose gravel will ping off them or allow access to all the spark plugs or allow use of power steering. So there a little "pricey", well what's 2 years worth of knuckle skin worth these days. And yes they even go in easier than TTI's. Ask my 71 Demon with the 400 how many cuss words I didn't use.
Done that and been there.!!!!!!!!!!!!!!!!!!!!!!!!!!!!
