well the 1970 challenger did not have the plum crazy purple as a stock color they came up with that color in may 1972and at the time it was on the barracuda until 1994 when the 'cuda was discontinued and then they put it on the challenger
There are 2 adjustment screws on each light that align the headlight, one will raise and lower the light and the other will move the light from side to side.
It depends on which engine you have in the 1970 Challenger. If you had the 318ci, you could expect to get 11 - 14 mpg. With the 426ci hemi or the 440ci six pack, you could expect 6 - 10 mpg,...