[67killerb]

I am about to put my new headliner in my 67. I have removed the old one, cleaned up the 4 bows, making carefull notes and marking them so I know where they came from and which holes they go back into, but in looking at the headliner, on the underside of it, there are 5 flaps where you can slip a bow thru. It's marked as far as which end is the front. Why are there 5 flaps? Or is this because the same headliner will fit other cars? Also, I have read past posts that it should be done in warm weather. Well, it's 10 degrees outside tonight, but I can heat the garage up to about 70 if need be. Will that along with a heat gun give me a fighting chance of getting this thing in ok?