I bought my 1975 Harley as a basket case for 5000$ 6 years ago (invested over 6000$ more). When I got it, it was in horrible shape, the cases had a family of mice living in them. There were boxes and boxes of pieces (you can see a few of them below), the only pieces that were together were the cases, heads (seperate) and tranny, all had to be rebuilt. I spend the last 6 years rebuilding almost every piece by hand putting it back together, unless listed below most parts remained stock.
Basket

Original basket case pieces used to put bike back together

More pieces used to put bike back together
Cam

New Andrews 'A' cam
Case

Original Case 1975 FXE

Original Case 1975 FXE being Touched Up
Piston
Original 1975 Pistons
New Wiesco Pistons
Head
Original 1975 heads (damaged)
New 1975 S&S heads
Engine
Original 1975 engine (first fitting)
New 1975 Engine (first fitting)
New 1975 S&S heads / rocker
Original 1975 engine complete (before rebuild)
New 1975 engine complete (after rebuild)
Frame
Original 1975 engine (frame fit)
Original 1975 new engine mounted in frame
Original 1975 mounting transmission in frame
Original 1975 mounting primary side in frame
Clutch

Original 1975 clutch (after rebuild)
Complete

Original 1975 complete