are these absolete now? Or just a nation wide backorder?

If you haven't tried them yet, Call Jegs and see what they say.
https://www.jegs.com/i/Mopar-Performance/312/P4529792/10002/-1

For years the Mopar wires had one wire that was too short to reach anything. Not sure if they ever fixed that or not. The local dealer just kept some spare wires on the shelf since everyone complained about it.

Oh, after almost 9 years at MP I am pretty familiar with that.

I added it to my open issue list, engineer ordered them but he had no vehicles to try them on...however I got the chance to try them on an unmolested 1966 Satellite 383 4 barrel with all the factory looms, shields, etc still in place. After they were installed the end user comments were: "This is the most perfect fitting set of plug wires I have ever seen, what are people complaining about?".

Will they be perfect for a 1970 440 6 pack road runner? Maybe not.
I believe later model wires became longer over time, but that is from memory. The majority of customers most likely owned slightly later models than '66.

All this led to me later digging up a late 70s generic Mopar OE big block wire set which I can dig the number out for (have it somewhere at home). Those are all super long and will fit everything but will be sloppy on most cars. they will require taking the dist. ends off and customizing but at least there is a ton of wire to work with. Through OEM mopar parts, most of the big block wire sets all superseded to this one last known number. It's probably ns1 by now but who knows.

All these gyrations, just so a person can have screaming orange wires with a Mopar logo. Hey I still fly the flag somewhat, but c'mon

Myself I just can't stand brightly colored plug wires of any kind for anything I own or work on....If I am buying them, they better be black.

It has been a long time since I had that particular issue but I think it was with the orange wires and a 440 that I had in my pickup truck. The #2 wire was just too short to reach the plug. I don't think I kept any pictures or part numbers. Could've been a run of parts where the machine got set up wrong for the #2 wire or something. I'm pretty sure this happened before you were at MP otherwise I would've sent you a picture.

People did ask why they didn't work. I never got was a complaint from anyone who had a totally stock one of any year, though. They always had headers and MP valve covers.

I always thought they should sell the wires without the dist. ends attached, but then people would probably freak out about that instead.

I'm pretty sure Mopar Performance got their pieces based in JUST ONE setup, and Chrysler made several routes for several big blocks. That can be a problem building a stock setup on engine if the casuality is not on your side. I had to get a NOS 73 and lates BB wires kit for my 74 Charger out of ebay ( I had the PN 'cause I have the parts catalog, so preoceeded with search ) which is way diff lenght than previous years. And I bet also changes depending in body due diff equipments added on C bodies rest of Big bodies ( not just on laters but earliers too )

Then measured and got them made by firecore accordingly. The NOS set I got is storaged.

So, the MP set could or could not match with your setup depending if you are building an engine based on the setup MP choose to make them

says manufacture ship date unkown

Mopar OE 4339405 is the longer orange wire set FYI. Through oe almost all big block apps superseded to it when I checked back in 2008 2009 timeframe. I think they are NS1 now, but there should still be some floating around.

Try our 7mm set. Guys have really liked them for the last 13 years.