Stangman
Project car a.d.d.
Take a housing inside Home Depot and test fit while inside the store. The holes are brittle because of their age and they will crack at the hole if the screw is too big.
Did that myself. Cracked em good. Found a small tap and 6 small allen head screws and drilled/tapped the housings. It was very tedious.... and there was jb weld involved lol