Your Poly engine mounts will almost work, a driver side mod regarding it's spacing needs to be addressed. Maybe make up the slight difference with washers to act as a spacer. Has anyone mentioned you'll need a car oil pan for the 360?
The "coat hanger looking stuff" inside cylinder heads is from the sand-casting procedure, they helped keep the mold shaped while the iron was poured. When the sand was removed, the wires stay behind.
After the cam bearing rearrangement, did he test-fit a camshaft to check that it turns freely? At my shop, if a bushing has to be removed, it's not getting put back in. They don't go in a second time with the same "press fit".