Thanks . Im trying to bridge the gap between race car and fun to drive street car without crippling it so I can take it on some drag and drive events . As you know thats a tough space to operate in and do well in either direction. I will put together a thing for the projects section once this all get done but heres a couple of other shots. I am fairly certain I am the only R code 70 in the world with a late model Mustang 3 link grafted into it. This system (And some of the parts) is what you find in the 2012 CJ .
I did the Watts simply because you cant beat it in either arena for rear stability...

Posting this just so the information is out there . I wasnt able to find anything other  then a blurb on an obscure forum saying that the box will not work with a FE mustang.  A conversation with JBA yielded a little more info that they had indeed modified a set of their headers to go on a 390 mustang some years back but didnt pursue making it a thing.
This Box has a good ratio and its a power box so it removes all of that nastyness from under the car . You simply use all manual steering parts to get it hooked up . I am using an electric Ford/Volvo power steering pump on it and although the car hasnt been driven yet it steers pretty easy sitting here on an epoxy floor with most of the weight on it.
As for the exhaust....... Well I looked at how many sets exit that port and I dont believe there is a set out there production wise that will bolt on. Ive never had any stock CJ manifolds but I highly doubt that will work as well given what you can see here in this pic.
Will have to put some time into this tube as well as mill this 3/8 flange a bit but I think its doable . You can slide the engine back some if you have the adjustable engine mounts but if you do with power brakes that ends the possibility of you using very tall valve covers. I have a set of Jays covers on there now and I can maybe go back 1/4" .
I may end up removing the box and milling as much material off that boss as I can as well as the 1/4" scoot...
In short , the box will go and it will work. But not without some pains... Personally I cannot stand the factory power steering setup or the ratios that come with it so I guess its worth it...

NO way its legal to have this much fun.........

Yep , and the polar opposite of that would be the mustang . Personally I feel that the damage is done not 3 inches from the heads and all the other work you are putting in really doesnt help you to overcome that. Im sure that somewhere along the line Jay has Run a mustang header and a truck header on the same engine on the dyno and could tell is that is indeed the case.

So there is the rub . To get a 2 or 2 1/8 into collector on either side you then have to do some pretty stupid things with the tubes to keep them at about 40"  . In the mustang chassis this means tight bends around in circles

For instance , cyl 1 and 2 is right about 40" total length . Number three you can get the 40 without too much gymnastics , but some  , well now that youve done that number 4 is simply a nightmare. Doing number 4 without what youve done with number three wouldnt be bad but you had to do it so now here we are... If we cross that 4th tube over then it removes it from the equation and keeps its length and you do your 3rd tube and go have a drink or a smoke or something...

If you want to pack them all into their individual collectors you end up with this https://i.postimg.cc/C5hnJBGR/REF-FE-Headers-Mustang-Cougar-390-with-automatic-006-rs.jpg . Mind you , you still need to steer the car and that mess is all kinds of hindering that endeavor !!!! I would love to see those things on that cougar in detail to see just how its woven around the steering components.

Bob , this one isnt getting much for mufflers......

Thanks for the input guys

Thanks guys , I cant seem to find the fire shield yet but this thing looks decent... What concerns me is that "Hook and loop" I cant swallow that they created 3000 degree velcro.....

https://www.amazon.com/Design-Engineering-010478-Protection-Closure/dp/B002R4XMPM/ref=sr_1_73?crid=35E9QGKC992ZR&keywords=fire%2Bshield&qid=1644935929&sprefix=fire%2Bshield%2Caps%2C72&sr=8-73&th=1

Bought these thinking I could modify them a little and get them on the car but between the borgeson box and the AOD I would have to cut on them pretty good . Someone may need them as is . By the way they turn in at the collector I would say C4 or 4 speed . $600.00 and the ride . Will consider trades.....

Thanks

Kyle