Just got myself a 68 Barracuda Fastback!

Welcome to FABO, looks like you are well on your way.
Personally, i would get it running and driving (and safe) first with the car as is and then upgrade as time and money allow.
Drive it and work on it as you go and then save up for a bullet to put in it!
I defiantly agree with you about slowly building it up but The thing is, cylinder 2 has 0 psi. So that motor is already going to need a rebuild and I don't wanna spend money in that when I want to put a 408 in her so bad. I love stroker motors and I didn't get one for my mustang so I want to for her. Right now thigh it's interior and painting the engine bay. Next will be the motor and trans and then body and paint. Things may change