Those tips are not correct for a scamp, You need ones for 68-69 Barracuda or 70 Dart Tips. They are for a Duster and are too long and the Hanger is in the wrong spot also.
I just put these Hooker Headers on my sons Dart last week. the only thing I had to do was grind the heads down on 4 of the header bolts other than that they clear and fit good.
These are Accurate tailpipes with stock tips, I think your exhaust looks right with the amount of angle your tips are at. The factory tip actually had angle built into it it to make the tips shoot up more so then on any other Mopar tip.