I have 4 round 6 1/2" speakers.  Is there an easy way to mount them
in the front doors and in the rear cabinet where the factory speakers
are?

If you have successfully installed 6 1/2" speakers, please share how
you did it.  Include photos if any.

If you cannot fit 6 1/2" speakers, what is the largest size that can
be easily used in a Westy.