Probably too many to count but;
1. At 14 or 15 years old, I bought a 56 Desoto with 330 hemi, and thought it was too rusty to save (it wasn't). Engine ran perfectly, until I tore it down. It went to the junk yard. (Yep, that's what they used to call them).
2. Trading my 69 Barracuda, 340 4spd...