75 Dart - 340 - Header's Choice's

I'm in the process of installing Schumacher Tri-y's on my 73 Dart Sport now. They are made from some good steel - heavy compared to others I've seen. The fit is OK but not as good as advertised. With a Borgeson steering box the driver side clears. On the passenger side, with the engine placed according to Schumacher guidelines, the idler arm fouls 2 tubes. Schumacher says they should clear, but they don't. I'll have to dimple them. Also, they have the ball and socket fitting, which I like, not a flange on the ends.