Old Car Collection in West Palm Beach, Fl (Late 60's)

[stretch cab]

When I was a kid growing up just north of WPB in the 60's my grandfather used to take me to a warehouse in West Palm that a friend of his owned that was full of old cars.  From a kids perspective it was a magical place with all the huge very old original cars.

I can't remember the owner's name but it seems like he either owned or was high up in the Rinker concrete business.  Also seems like his son in-law had a Model A Mail Truck if that rings a bell with anyone.  Good memories without all the details leave you scratching your head.

Can anyone put a name to the owner?  And better yet, some pictures!!!