You need to do more research. Watch the videos, get the build guides, read posts here. Flesh out the details of the dream.
As for a donor, which is probably mentioned in the Build a Roadster for under $3000 book, first, you need to have a good working knowledge of all the systems. Second, you must realize that the typical used car depreciates until 20-30 years after it's built, then the cars that old that have survived start to go up in price due to nostalgia and supply to demand along with inflation. Third, there hasn't been a good donor vehicle built for a T-Bucket in a very long time. You want a V8 (ford for you) with an automatic transmission, and a fairly narrow rear axle. Crown Vics are too wide, even later Mustangs are pretty wide and trucks are even worse. The last V8s with carbs were the early 80s. That's 40+ years ago! Search for 79-82 Mustangs and Fairmonts and you will see that they are rare and expensive.
Now you have an engine with accessories you won't use, a transmission that's got over 100K on it, and a too wide rear axle with wrong attachment points, plus maybe some gauges, wiring, possibly a fuel tank and maybe 4 lug wheels. Get the driveshaft shortened. That 5K donor you scored is now a carcass you need to haul off for scrap or part out, to try to get your money back out. This can take years.
You still need to buy or build everything that is supplied in the typical Stage 4 kit. CCR's kit is 9700 according to the site. Add 230 for Ford mounts.
If it's time over money, scrounge a core engine/trans, buy a body and put together a frame out of 2X4 wood. Stare at it and picture every detail. Haunt swap meets, estate sales and junkyards. Have a complete, highly detailed shopping list of the parts you want, the acceptqble substitute(s) and prices. Snap up bargains and trade your time for deals.