Mounting a 5-point Harness

[Grim]

I have a 5-point harness that I am wishing to install in my 90 Ranger XLT. I am curious as to how I should go about mounting the shoulder straps to the back of the cab. The instructions that come with the harness specify that they should be mounted 0-10* below the shoulder; obviously I can not mount them at 0* due to a rear window and the fact that I'm 6'3". With that said I also understand that if I were to mount directly to the cab back without reinforcing it, if something was to happen, the bolts would just pull through the metal.
I had thought about making a harness bar, but due to information that I found on another site I decided against that.

Any advice is greatly appreciated.

 

[alwaysFlOoReD]

It's not advisable to use a 5-point in a daily driver.
You've already run into one of the problems...lack of proper attachment points. IMO the only proper way to attach is to a properly built roll cage...not roll bar but cage.
I've done a lot of research before building my attachment points in my race truck. Here are my thoughts;
-The lap belt is meant to keep your body in the seat and prevent your head from contacting the roof. 45* angle from verticle and at a point that lets the belt fit over your hip bone. Keep it as tight as possible. I bought a custom 5-point with a ratchet system integrated in the lap belt.
-The shoulder belts are meant to keep you from losing your teeth or face on the dash. I have my attachments at 0*. I think policy here should be 0* to +10* [above shoulder], the reason; to prevent spinal compression. Remember, the lap belt is supposed to keep you from moving up.
-The sub belt is to prevent you from sliding under the lap belt. 6-point harnesses are better as your nads are less likely to get crushed.
-It's pointless being belted into a seat that has give ie; a stock seat. If you sink into the seat in a crash, you are going to bounce out of it just as hard. Again leading to spinal compression and or broken hips.
There is a lot more tech but I'm a slow writer so check out pirate4x4, dezertrangers, and various sanctioning bodies for more in depth ideas.
Remember, all this info I've given you is my own conclusions. Please do your own research and draw your own conclusions. It is your life after all.

Good luck,

Richard