Adam has it right; the hangars will set the tips in the correct place. Find the hangars on eBay all the time.
jd340- Can you please post a few pix of your dad's car for me? Also, can you ask him the name of the color on his car? I really like that color, and if it's the same one I'm thinking about, I see it a lot on 68 Darts. Must have been a popular color in 68.