Replace Chevrolet oil pressure sending unit 1973-1987 (1986 C20)

The oil gauge on my truck wasn't working until one day I saw it flicker to life so after some research I found that the oil pressure switch/sensor might be the problem. I couldn't find a video of how to replace the oil pressure unit on a 1986 c20 so I made one myself. It's a 305/5.0L but should be the same on most sbc! (c10, c20, c30 and k10, k20, k30)

Oil Pressure Switch from LMCTruck: https://www.lmctruck.com/1973-87-chevy-gmc/cc-1978-86-oil-pressure-switches973-87-chevy-gmc/cc-1978-86-oil-pressure-switches