I'm looking for some suggestions to buy or make seatbelt extensions for my 73 240Z.  I'm looking for something like the airlines use that have the buckle on one end and the male tab on the other end.  I would like to be able to attach it to the inner side of the belt (the trans tunnel side) when needed.  I don't really want to replace the original belts.  I would like to get a pre-made ones, (again like the airlines use) or if I can find tabs and buckles that would work with the factory belts, I can have them made.  Anyone know components that would work on the factory belts or have any suggestions to resolve the issue?

Thanks

Wesco Performance sells seat belt extensions...

www.wescoperformance.com

Better yet, get them to supply full replacements for your OE belts.  If you need extra length, they can probably work with you on that.

FWIW, your 50-year-old OE belts will probably be worthless at collision speeds beyond 20 mph.  The problem lies with edge fraying and material degradation (sunlight, sir pollution).

And if you do go with Wesco, buy the roadster belts, https://www.wescoperformance.com/noname.html.

Get the 11 inch sleeves and hardware ($10 extra per side). 

I have Wesco roadster belts in both of my cars.

+1 on the Wesco Roadster Belts. Here they are installed on my car, using the OE mount points and bolts. Very comfortable to use, all the convenience of a modern 3-point retractable belt.

Thanks guys, I'll check them out.

Just a follow up to let you guys know I took your advice and bought the belts from Wesco. I did not buy the hardware kit but did buy the angle bracket, which was available separately. Not sure about other models but since my 73 interior belts mounted to the trans tunnel, the angle bracket was necessary for attaching the inside portion of the new belts. They worked out well and were easy to install. I had a few pieces of carpet left over from another job so used it to cover over the cavity where the old retractors resided.  Held it in place with carpet tape. You can't even tell the cavity is there.    Thanks again for the advice.

 

Paul