Your son's bike is a big improvement.
I will probably try to get this thing running as is, but I have no qualms about chopping it up. This is the 7th bike in my current stable (2003 BMW R1150RS, 1998 Guzzi Centauro, 2007 Triumph Thruxton, 2011 Royal Enfield C5 Chrome, 1941 Triumph 350, and...