Sorry for the delay......
Little story on my daughter's Scamp, bought it for 150$ in the mid nineties from a scrap yard, home restauration (except paint and dual exhaust system), take off the 40,000 miles original 318 and transmission to put a 360/4bbl/727. All the job took about two years and cost about 1,200$.
Run the car for 18,000 miles in twenty plus years, sold it for 4,000$ in automn 2017. The new owner didn't want the 318/904.
My son bought the GTX for 700$ in 1994, home restauration (except paint and exhaust system). Original 440 but have to find a 4 speed transmission and Hurst/console shifter.
The restauration took about 2 years, don't know the cost but my son sold the car to a California guy for 10,000$US in 2007. My son died of cancer in 2008 at 36 years old.