When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
A few months ago, I happen to mention to my wife that I had read on this forum that the rear seat belts out of a '93 or newer Camaro or Firebird would work in our '78 that now only has a lap belts. Bless her heart, she went to every junkyard in North Florida and found the rear belts out of a '93 Z-28 and gave them to me for Christmas! Now what do I do??? It is not obvious to me how to make these things work! I'm going to need some help or I'm in big trouble!
Why does your 78 only have lap belts? My 75 has 3 point or a lap belt and shoulder strap. The anchor point for the shoulder strap is the wheel wheel. The top of the wheel well has the ratchet mechanism and there is a pulley high up above your head on the pillar behind your head.
Retractor should bolt to the stock location in the rear, belt then runs through the retainer on the b-post and then bolts to the floor under the seat. You get in, pull the belt across you and snap it in. The under seat comes across the lap and the rear section comes across the shoulder. The sliding catch then snaps into the buckle by the console.
Please take a pic of your lapbelt only 78. I do believe that shoulder belts became mandatory around 75 or so. The aforementioned Camaro belt fix was intended for 68-72 cars, in which shoulder belts were optional. In tsw71's 71, you first click the lap belt in, then the shoulder belt hooks over a notch near where the lap belt buckles.
On my 78, the seat belt comes out of the pillar trim and from the outboard side of each seat. You lengthen or shorten it by feeding the buckle up or down, just like any modern car.
Re: Three point seatbelts...... (Pacin'California)
Here are some pictures that might help you out, they are of my 81 but should give you an idea on how the retractors should be mounted on a 78-82. They use a Torx-50 bolt.
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.