I've sold dozens of Eldorado bucket seat mount kits and nobody has mentioned having any problems until today. I just had a customer tell me I sent the wrong bolts for the outboard mounts that bolt to the stock seat mount locations in his 55 Chevy. They are 5/16"-NC on my 56 Nomad so that's what I have always sent in all the kits. I checked the Hemi 55 in my shop that still has the original floors and they are 5/16"-NF. So I re-checked them in my Nomad and they are definitely 5/16"-NC. I used CARS parts to rebuild my floor and replaced those seat mount plates.
This customer says he has new Taiwan floors. I'm pretty sure they're all the same floors, so why would his have NF nuts welded to it? Do all the new Taiwan floors have 5/16"-NF nuts?