If you look at all the pictures, there is a replacement tailcone ready to install included with all the "parts".
I would suspect that the recovery (flipping the plane upright) was botched and damaged the tailcone like that.
Regardless, why would you want a 180HP engine on a 150?
A friend at work flew gliders near Avenal, Ca., and there was an Aerobat with a 180hp engine as a tow plane. He said there were serious overheating problems with the plane...
This plane NEEDS long range tanks. Maybe it was a tow plane/banner tow, but you can't tell with the tailcone ripped up.
Still, cool project if the price is cheap.