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Old 08-16-2010, 11:34 AM   #1
dewey777
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1959 Big Back Window 3 point seatbelts

So I am going to start this thread, I've done searches and commented on some other threads but have not actually talked with anyone who has done it.

Has anyone installed 3 point seat belts in a Big Back Window????????

I plunged ahead and drilled my pillar to find out that it is not completely hollow like it appears to be. What do I do now?

Here is a crude top view picture of what the inside of the pillar looks like. I could cut larger hole in the face of the pillar to install a flat bar in and a nut and then patch it in after but I wanted to get some ideas first.

The PO (previous owner) had installed the 3 points with a piece of flat metal and a nut up high (above the window) but it is way too high and the seatbelt does not even touch your shoulder. I want to lower it for comfort and safety. I will post some pics later.
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Old 08-16-2010, 02:07 PM   #2
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Re: 1959 Big Back Window 3 point seatbelts

We have done 3 of then. We just drilled a 3/4" hole beside the fold your talkin about and welded in a 1/2" nut in it. You just want it about 4-5" above the seat back. If you get it to high you will regret it.
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Old 08-16-2010, 02:42 PM   #3
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Re: 1959 Big Back Window 3 point seatbelts

I thought about that but wondered if there was any legality just welding a nut to sheet metal? Was hoping to have some metal in behind to help distribute the load.
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Old 08-16-2010, 03:21 PM   #4
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Re: 1959 Big Back Window 3 point seatbelts

How safe is that with just welding a nut in the sheetmetal? I would think there are safer solution out there but I've not seen them. I'll be looking at this sometime soon.

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Old 08-16-2010, 08:21 PM   #5
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Re: 1959 Big Back Window 3 point seatbelts

It depends on the welder I guess. You should see some of the OEM mounts. Thats not just sheet metal there. It's 3 layers thick. I guess that we're (me, dad and grandpa and all that rides with us) are beting our life on it. You do as you like. He just ask what others have done.
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Old 08-16-2010, 09:11 PM   #6
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Re: 1959 Big Back Window 3 point seatbelts

I wanted to put a three point in a 58 suburban I had but sold it before getting to it. My truck is already restored and it is stock so I hate to start cutting and drilling. Years ago I was rear ended in a 68 Chevy p/u. After my head hit the back glass my face hit the steering wheel. wish I had shoulder belts.
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Old 08-16-2010, 11:33 PM   #7
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Re: 1959 Big Back Window 3 point seatbelts

Quote:
Originally Posted by blackdiesel View Post
It depends on the welder I guess. You should see some of the OEM mounts. Thats not just sheet metal there. It's 3 layers thick. I guess that we're (me, dad and grandpa and all that rides with us) are beting our life on it. You do as you like. He just ask what others have done.
Blackdiesel,
Not trying to offend you, I just wanted to know how safe and strong that would be, I didn't know that there were 3 layers of metal there and thought that someone else had another solution, I'm looking into using a seat with the belt built in the seat, the later year chevy trucks/suburbans. I join this forum to learn and try to provide info if I have it so I'm sorry if my question was offensive.

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Old 08-17-2010, 12:11 AM   #8
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Re: 1959 Big Back Window 3 point seatbelts

I am using Yukon third row seats with the belts built in. I figure GM did the engineering. I am using the stock mounting method welded to a frame that uses the stock seat mounting bolts. I calced my connections and welds based on the stock seat floor bolts being the weakest link. My floors are solid with no rust. If I get in trouble enough to shear the floor bolts seat belts are going to be the least of my worries.
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Old 08-17-2010, 07:24 AM   #9
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Re: 1959 Big Back Window 3 point seatbelts

Ya. I had the same safety concerns and ended up with Dodge seats with built in belts to make me feel better about it. I see trucks all the time with lap belts or no belts and stock bench seats. I also liked the high back idea to keep my head off the glass in a rear end collision, but they won't look as dorky in my small window cab as they would in a big back window. Trying to re-engineer 50's technology makes me appreciate the comforts of my late model daily driver!
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Old 08-17-2010, 07:52 AM   #10
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Re: 1959 Big Back Window 3 point seatbelts

The seatbelt reel on the 06 dodge 2500 that I rebuilt the other day just had one bolt in the B-pillar that was about 1/2" from the edge of a big hole. It looked like it would be real easy to pull out to me. Testing a seatbelt mount would be about like try to catch a bullet in your mouth, you pitch it to them a couple of times to get the hang of it.... then you put the next one in a gun and as your pointing it at their head you tell him "this ones going to be a little FASTER". You just have to do what's comfortable for you, look at some OEM suff to get some ideas and go from there. and no offence taken
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Old 08-17-2010, 11:44 PM   #11
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Re: 1959 Big Back Window 3 point seatbelts

I have a big window truck as well and plan to look around for a real rusty and/or wrecked BW cab that I can cut up to have a look inside that pillar. If anyone has one they'd be willing to take the saw to I'd be really intererested in seeing pics.....anyone???
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Old 08-18-2010, 09:59 AM   #12
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Re: 1959 Big Back Window 3 point seatbelts

Thanks for the replies, I might cut open the door side of the pillar and see if I can cut in a plate of some kind. Not sure when I will get to it but I will post pics if I go ahead.

Has anyone used the height adjustable mounts from a newer vehicle? I might check out the junkyard and see what they look like and if it's possible.....
(pic courtesy of google, only thing I could find)
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