Is my rusty 68 Barracuda salvageable?

The 67-69 Shells are out there, but going up in value like everything else. 70-74 forget about, til you start making big money. Just keep looking for a shell they show up just have money ready.
Try Oldride.com or search craigslist for a Western or Southwestern cars that don't have the ravages of rust
from cars in salt country. Buying a solid project car that is more expensive to purchase initially is money
better spent than the time and money that will go into your present vehicle. It is complete and will provide
many hard to find parts on any restoration project you choose.