Yep it is a pretty slick swap. The 67-69 barracuda notchback coupe is the lightest and stiffest of all 3 body types produced these years. Dry weight is around 2800 lbs. Put a V8 on an aluminum diet, and use an aluminum radiator, and you can still keep it close to 3,000 lbs curb weight with steel fenders and bumpers. I am seriously looking at modding for electric power steering, and using a unit out of a toyota yaris, and keep an aluminum manual box under the hood.
Heck i even figured out a Dana 457 U joint from a 91 dakota fits the ford yoke, and will mate to the stock mopar drive shaft without modding either one. Picked up a delco brand U joint off rock auto for that. also found a place willing to make me rear parking brake cables with a mopar front to fit the chassis, and ford e brake rear to fit the axle. No way to mount a pinion snubber to the ford axle though so i will just put traction bars on it.
A buddy of mine did the V8 S-10 from a 4 cylinder base model and used an 8.8 in the back. Had to redrill his axles and rotors to run Chevy wheels. These axles are turning out to be a pretty popular swap rear. They are cheap and plentiful. 31 splines, cars are 28 spline, Most came with performance minded ratios, and lockers, almost all of em with disc brakes. Parts are inexpensive. The rotors were bendix brand and $15 each new. and in my case the bolt pattern and stud size was identical to the car.
Found a junkyard in fort worth about 6 months ago when i was there for 2 weeks of training for my job that had so many ford xploders they told me if i pull it, price is $125. I got my second right side axle there for $25 LoL. The stock LSD actually works great up to about 350HP on the street. Once you add sticky slicks and solid track use with hard launches it wont hold up.
And yes that friction modifier oil is some stinky ****. I havent gotten to that part yet, but when my clutch kit came from yukon gear with the additive in the box, i could smell it through the sealed packaging when UPS dropped it off. My shop is in the back yard seperate of the house. I am gonna wear a tyvek disposable apron and some latex gloves when i do that part. Wife will kick me out of bed if my hands are smelling like that ****.