Halfbreed - GMC Z71 + IH Extd Cab

[fryer1979]

That's right. So then a center belt section from a square-body (73-87) with a bench seat should do perfectly...if they were longer. One idea is most auto parts stores stock those seat belt extensions, most I've seen are about 10" long or so. Another suggestion is the aftermarket lap belt assemblies. IIRC they are quite long, are offered in a few basic colors, work as a stand alone unit, and are fairly inexpensive. Again, any local auto parts store should stock them at about $25 or $30 (maybe less, it's been a while since I last purchased some). For a junkyard score, how about pre-87 Chevy fullsize vans? Or maybe an early lap/shoulder combo, and just cut off the shoulder strap? Just throwing ideas out now...good luck with the belts.

[1985-GMC]

You could use your fabric seat belts and order some seat belt webbing, then take them to a upholstery shop and have them sew them back up to the length you want. Look here http://www.strapworks.com/Polyester_Webbing_p/sbw2.htm though there are several other places to order it from.