Head Lights Breaking

I ordered a set of lights from a popular mail order company and the side markers did not fit. The side of the lenses would stick out way out, so far that you could see behind it, when put next to a set of OEM's they were way off. I ended up finding a set of practically NOS lenses that fit perfectly.

I've broken the inside top corners of my lights too. I never had this problem with the original stock metal hood. Mine started happening when I added the fiberglass hood. I bought the same aftermarket hood at the same time for two fox cars and it happened on both cars.
After an extensive investigation I found that the thicker fiberglass hoods took up the space needed for the headlight markers to tuck up under it when closed.
The metal on the front edge of the stock hood is thinner, so if you're breaking your lights you need to adjust your stock hood forward on the car to achieve clearance for the lights. Try that!
Now, on my fiberglass hoods I had to move my them forward to gain clearance and I also had to grind and sand the underside front edge of my fiberglass hoods, thinning the material to gain enough clearance for the headlight markers. I then repainted the underside of the hoods and my results, no more broken headlight problems!

Long post short? Adjustment is very important, as well as being gentle when closing the hood.
If ya drop your hood, chances are your gonna break your lights.

good luck