OKay, let's start with the essential: Hemi, TF (more TF were built than 4-spds), 'glass pieces & rear. Now the Hemi (including x-ram) will set you back 16k minimum, the TF (rebuilt by yourself )350 or so, the rear (8 3/4 stock) 2-500 bucks ( I sold 1 for 200 out of desperation), 'glass pieces $1000-1500. The S/S springs? There's enough guys around that aren't happy with them that you could find them used if you had to.
The K-member can be modified for the price of labor (again, remember I posted you're doing most of the work yourself FOR yourself) so that' 0$. Since you're starting off with a Dart270 you already have the door panels & dash, so nothing special there unless there missing, and remember I said a DECENT (aka) Dart, nothing perfect so they're at least there. You can clean-up re-dye the doorpanels so thet's almost nothing. But wait! What about the "famous (?) radio/heater delte plate that everyone thinks makes it "official"? Well since you have a complete dash, you can send that plate out to a shop I know of that will convert it for $200 bucks. The outside mirror delete plate is rare, but I have my own source for them, so they are obtainable. Now you have the A-100 seats. These were basically fixed-back truck seats as we know & the frame of these things were the same throughout their manufactur. So all you REALLY need is a frame set & aa good upholsterer, unless you use the set from Legendary Auto (which offers discounts to FABO members and you're all set. The lightweight seat brackets? Three hole-saws, a good brake & 40dollars in sheetmetal will get you a set instead of the $350 or so some vendors charge. The rear divider that replaces the backseat? Go to an big upholstery supply place & get "speaker board"-- they have it in sizes large enough for this application
The rear quarter cut-outs? Find a friendly, genorous owner of a car with them & make a template yourself. I was lucky enough to fond such an individual & he sent me a paper template I transferred to sheetmetal (for durability) and there you go! Yup, it's work but not rocket science or grossly expensive.
Okay, so I've accounted for the driveline, 'glass, stripped interior, suspension & body mods. What did I miss that seems so hard to do one "right"?