The "Throw Away 318"

Cley, I too would just run the 318 till you find time and money to redo the 360. The 360's thrown rod ate the crank too.

So just keep the 360 block and buy a complete crank rolling kit (Scat or such) that is balanced. Then over bore the 360 block to suit the kit.

Even the trash GM 307 is a good low power utility engine.
Would I try to build a GM 307 out to 350 HP? NO!!!