new ride, 68 barracuda formula 1 ? Help Decode !!!

OP
Your posts are all extremely ambiguous.
Putting wrong year bolt-ons does not a rebody make.
If you want to build a 68 S, you simply use the 68 tub with matching VIN, and bolt on whatever you want.You can mod your 67 front clip and bolt it on. Nobody is going to be fooled by the recipe. Sure at resale time, the car will sell at a price below what an all-original-parts, 68S might; No biggie. If the tub number and powertrain numbers match the VIN, and the VIN says 68S, then you still have a 68S. It would just be 68S with a different clip.

I myself have a 68. I call it my S-clone, so I'm right up front about it not being a true S.It started life as a mundane slanty A/T car. The Vin still says so. And the Vin matches the tub. It has one 69 front fender, and 69 tailights. I tried to put a 67 grill in it but absolutely nothing is the same as to grills in the 67/68/69 series
The car now has a 360 painted Orange, and a 4-spd, and has Duster K and suspension.
The first point is; build it anyway you like, but keep the tub and VIN together and untouched.
The second point is; do not attempt to convert the 67 into a true 68S. There are over 40,000 of us here that know you; and Hawaii ain't that big.
If your 67 tub is the better one, take whatever you need from the 68S; EXCEPT the tub, the VIN, and the powertrain. Sell those as a pkg, to help finance the 67build. Somebody, somewhere, has got to have a dream of building a 68 383 S car.
But you better do it fast, cuz I know a guy with a 68 383S tub and matching VIN.