Good on you for installing the 3 point seat belts. I did this years ago and have never looked back. Safety is a serious thing...
I personally dislike the look of the seat belts being supported up high. To me, they look horrible and just hang there. I went with the lower mounting option, just below the rear quarter glass. See pictures -

https://www.mustangsplus.com/Mustang-3-Point-Seat-Belt-Sets/
http://www.andoauto.com/Belt319-L.jpg
http://www.classicgarageblog.com/wp-content/uploads/2012/06/classic-mustang-retractable-seat-belts-conversion-l.jpg

When I did it, I remember people saying that the belt would be annoying and cut into my neck. Not so at all. The belt feels so comfortable and sits nicely over the shoulder.
The anchor point below the rear quarter glass, I welded a high tensile nut to a flat bit of plate, drilled a hole into the body of the car (below the rear quarter glass) large enough for the nut to site inside the hole and then welded the plate to the car. For the retractable part of the seat belt, I bought some steel angle, cut it to suit the length of the retractable part of the seat belt. I then drilled two holes in the steel angle. One hole for the retractable to fix to and the other hole was to bolt it to the floor. I also cut another flat bit of plate and put it on the underside of the floor and then put the bolt through and secured it in place. So there is the angle steel on top, the bolt going through and then a flat plate underneath.
It works well for me!


 

Last edited by Stevo (6/06/2018 4:31 PM)

I'm not big on drilling holes in the car either, but these two holes for the pivots are only a recess for the nut to sit in. The plate is welded over the top, so the pivot point becomes a part of the car.
I have no regrets on mine and much prefer it over seeing a seatbelt dangling front the roof.

Bolted to Floor wrote:

Stevo, could you post or send me a pic of yours? I saw how it was done in a CJ pony parts video and it doesn’t sound like the same thing.

I would be happy to, but the "tiny pic" thing with the forum doesn't work for me. If you pm me your email, I can send you a few pictures of the mounting points of the seat belts.
 

I also just ordered the Wesco 3 point sealt belt kit.  Here are a few links that may be helpful:
http://forums.vintage-mustang.com/vintage-mustang-forum/714097-3-point-seatbelt-research.html
http://forums.vintage-mustang.com/vintage-mustang-forum/660522-1965-coupe-3-point-seatbelt-install.html
http://forums.vintage-mustang.com/vintage-mustang-forum/716954-3-point-seatbelt-install-w-pics.html

I can't get the tiny pick thing to work. I would be happy to email them to you and maybe you can post them up?

Stevo wrote:

I can't get the tiny pick thing to work. I would be happy to email them to you and maybe you can post them up?

Sure.  You have a PM.
 

Stevo wrote:

Bolted to Floor wrote:

Stevo, could you post or send me a pic of yours? I saw how it was done in a CJ pony parts video and it doesn’t sound like the same thing.

I would be happy to, but the "tiny pic" thing with the forum doesn't work for me. If you pm me your email, I can send you a few pictures of the mounting points of the seat belts.
 

Here are your pics.  You stated in your email to me: "The pivot mounting point is the one just below the rear quarter glass. Not really a big deal to drill the hole in my opinion. Where the retractable sits, I went with a piece of angle steel and drilled through the floor and plate on the underside."




 

Thanks Jkordzi! Much appreciated.

rpm wrote:

Hey John, I am happy with the 3 point Wesco Performance belts I installed. While they have several style buckles from which to choose, and one that matched the Mustang pretty well, I went with the retro old school airplane chrome buckle, just cause I'm I'm a tough guy.

 
Hey Bob, can you do the one handed buckle with these?? I’m not as agile as I used to be!!!

jkordzi wrote:

Bolted to Floor wrote:

jkordzi wrote:

I also just ordered the Wesco 3 point seat belt kit.  Here are a few links that may be helpful:
http://forums.vintage-mustang.com/vintage-mustang-forum/714097-3-point-seatbelt-research.html
http://forums.vintage-mustang.com/vintage-mustang-forum/660522-1965-coupe-3-point-seatbelt-install.html
http://forums.vintage-mustang.com/vintage-mustang-forum/716954-3-point-seatbelt-install-w-pics.html

 
Thanks for the links. At some point I should be able to view them. I’ve tried 2 times in the last few minutes and get a pop up add that I can’t get around or back up to this page. I have re-open the forum page. That was a nice site till all the adds started, can’t stand it now.

I use Firefox as my browser with the uBlock Origin and Ghostery add-ons.  I don't see any adds.  You do have to login to see the pictures.
 

I installed the Wesco 3-point seat belts in mt 65 FB.  Note this install places the upper anchor point in the inner structure of the roof near the window opening, just behind the front seat.  Good quality components.  Pretty happy with the results but have some observations:

1.  The anchor plate for the upper mount is supposed to install with 1/8" rivets but the holes in the plate are 3/16" so the larger rivets are required.  Also, the plate butts against the headliner bow, which is fine, but leaves part of the plate hanging out of the opening and requires drilling another hole for the rear-most rivet. 
2.  Although a shoulder bolt was supplied to install the upper anchor bolt, a regular non-shoulder bolt was supplied to install the lap belt anchors to the trans tunnel.  I substituted the old seat belt shoulder bolts and had to enlarge the holes in the anchors to accept them because I wanted metal-to-metal contact.  Using the regular non-shoulder bolt would have resulted in compressing the carpet and padding - a recipe for that bolt loosening up in the future.
3. The lap belt buckle uses a friction roller to adjust its position and so doesn't slide on the seat belt as in modern cars.  This means that it has to be individually adjusted for each driver.  It also means that unless you slide it back, it prevents the belt from retracting all the way, leaving some of the belt bunched up on the rear floor.  Not a problem except that it's visually annoying.
 

Bolted to Floor wrote:

Jkordzi, Thanks for the tips, how difficult is it to slide the buckle up and down the belt?

It's easy to slide the buckle and unless you're concerned about it gathering up a bit on the floor in the back, it's not a big deal.  I just don't understand why they went with that design, since the mechanism that locks the belt and keeps you from moving forward in a sudden stop/accident is entirely housed in the reel that bolts to the rear floor. 

I should also add that I ordered them with some options so they'd fit better in a 65 FB:
1. These are the 140" design that allows mounting the upper anchor in the roof structure.
2. I specified that they build them with the long "C" mounting piece so I could bolt the anchor and the retractable portion to the same location.  You can see the the regular "C" end in their instructions: https://www.wescoperformance.com/seat-belt-install-3-point-retract.html#top.  The long "C" end is bent in a kind of lazy S shape so when bolted behind the reel, it sticks out to the side a bit and keeps the belt from getting tangled up.  Here's a picture of the long "C" end I pulled from another installation guide on another forum:

If you go with the regular "C" end, then you have to bolt it to the stock location in the rocker panel.  That makes an inverted "V" and to my eye doesn't look good and impedes getting into the rear seat area.
3. I ordered them with long sash guides which keeps the belt down closer to the shoulder.
4. I also chose the 11" bucket or bench seat sleeve ends, which bolt to the tunnel.  This length (as opposed to the 8" length) seems right for typical bucket seats installed in our cars.

John, could you please add a picture of final attachment points?
And possibly the options as well?
Don’t recall which buckle/latch you used...Starburst?
Or would you go with a Jeep style?

I liked the way yours looked.
Just didn’t get any detailed pictures
I would like to order belts for the 65 coupe.
Thanks,
Dan