Pickup the cast iron L67 coil bracket. Also found on some early L36's.

If one breaks, which is common for the passenger side L36 aluminum piece to break, all of that stress is now on the drivers side. That one is known to break when it is the only one being used.

So get an iron piece for the passenger side.

There hasn't been a 327 for a long time. The 5.3 is a 325.