only thing with going to the outside of the frame rails is on the driver side the master is right there and may get to hot...I know I can fab a shield so that may just be the way to go...I know on some car they get really close on the fire wall and the shield works well so I will take a good look at it..so now who has the best price on flanges with the stub on them?????if I had a lot more time I would try and make my own out of just the flange itself but most of the time I only have 1 days home to work on the car ....