Hey Ken – if you scroll up the page, I’ve got my install documented. I used the Cool Cruisers of Texas (Taiwan) Toyota FJ-40 three point harness kit.
The lower mounting point just bolts inside the plate on the rocker.
I drilled through the lower box structure on the rear bulkhead to mount the reel. I put a doubler plate on the back of the box structure.
The CCOT kit comes with all the hardware you need, bolts and brackets. I don’t know if that’s the only place you can find it, but it was very convenient to order.
I think there’s a couple other people here that have used that same kit. Some of the later model cars (‘74s?) that originally had three point belts probably have an easier install.
My ‘73 had the reel inside the rocker, but the non-retractable belt hanging on the bulkhead. My wife always had a terrible time, trying to hook the shoulder belt, and then stab the tongue, while holding all the pieces together…. This is way better than that.
You have to build an angled spacer, or bend the mounting strap, so that the reel is in a vertical position. If not, the reel locks up when you try to pull the belt out.
Good Luck
Chuck
P.S. I think the kit was just shy of $200.