This is the kit we’ll be using to protect the occupants: it’s the Rocky Hinge manual kit. They also have one that’s controlled with an actuator. It’s so easy to install, even if you lose their excellent instructions. What I like about it is all the dimensions are “major” fractions. You won’t have to worry about whether you’re counting 32nds or 64ths; all the dimensions you need to know are either 1/2″, 1-1/2″, etc. It comes with led lights and a built in switch that will tell you when the pin is either in or out.
I decided to put it in the middle of the door because I was afraid the latch would get kicked if it was down near the floor. This way, it’s in line with the door pin too. Just slab some masking tape on there, and drill some holes.
To find the location of the hole that needs to be in the door, I put some tape around where I thought it would be. I mounted the unit, closed the door, and drove the pin against the door a few times to mark the tape. I decided to put the main unit in the kick panel for one major reason: if it’s accidentally switched when the door is open, the pin won’t hit the outside of the car.
The knob comes in a brushed aluminum finish, but I painted it black to blend in. The stainless bolts are standard.
I ground a flat where the set screw in the knob tightens on the shaft so it was oriented to be pointing towards the door when it’s locked.