I fit a 70 on a 16, so... not sure how much longer a 67 is.
Funny thing is, were discussing stainless brake lines in another thread.
I drove 2 hours away to pick up that Lemans Sport, with a Ram 2500 HD, and as soon as I got on the freeway, the brakes went out because the rear line just disintegrated. The truck was only 6 years old.