71 Demon Build
I hate to read this... speaking as a guy who sold my first car, a Swinger, back around 2007 or so and now in 2021 bought another Scamp, I'd encourage you to hold onto the car if you can. Maybe try selling the motor/tranny/stuff from your brother's wrecked car to get you out of life's pickle if that's enough, and then save the rest of your car for when you can finish it... another motor is a lot easier to come by than your first car... Once those are gone, they're gone.
Good luck.