Here's the deal folks....
There is no such thing as 80/20 anymore... ACC may classify it's new "Raylon" product as a replacement for 80/20, but it's not the same as what originally came in your 1964-1967 Mustangs.
Truth is, the new "Raylon" does not contain any percentage of Rayon. It's simply a re-formulated and better-tufted nylon product. It's more durable, less prone to "fray", and the tufting is twisted (more like original) and does not have the corn-row effect of the existing 100%-nylon product ACC still provides. In my opinion, Raylon is closer appearance-wise to what originally came in our cars, than what had previously been sold to us as 80/20 for the last two decades anyhow.
So, my advice is, even to you concours folks, is to forget about the old 80/20 and 100% nylon applications, forget about the switch from 80/20 to nylon in 1968, it's all just history now, and you're not going to get "true" 80/20 anywhere unless you want to spring for an NOS carpet.
I would approach carpet purchases, today, as a two-tiered offering....
The current ACC 100%-nylon being the entry-level "budget" carpet.
The ACC Raylon being the up-scale and more expensive premium product.
And if you're really wanting to go up-scale, you can special-order a mass-backed Raylon carpet direct from ACC.
Right now, we're working with ACC on colors and logistics and product SKU's so that we can offer the Raylon, in original colors, all the way through 1973, effectively having it available applications that had historically only been available in the existing lower-quality 100% nylon. This isn't easy, because we have SO MUCH "legacy inventory", so many carpets on the floor that won't fit into the new array of offerings. We'll have to create all new numbers for the new 68-73 Raylon carpets, and make ROOM for them (arghhh). Slow process that we're working on.
But forget about 80/20.... Raylon is not 80/20, and Rayon is no longer available in any ACC carpet, or any alternative manufacturer's carpets.
Buy the Raylon with confidence, it'll look more original than the 10-year-old ACC 80/20 carpet you yank out of your car.
And how's a judge to know what the carpet blend is anyhow? The only real field test is to light it on fire....
