Old school towing vehicle revisited!

Recently I made a thread about a cheap, reliable, and capable vehicle to tow my 19' Bayliner with a grand total weight of no more than 3k lbs.

I got talking to my dad about it earlier, and being that he was and always was a fan of Vista Cruisers, suggested I get something like from the '70s that can be found as a fixer upper pretty cheap (below $2k) and that would actually increase in value.

The classic picture of a Vista Cruiser or Electra Estate or full size Caddy towing a 30' Airstream Land Yacht in my head makes sense. A 445 or 500 CI would move things easily What do you guys think? As mentioned I had in mind a Vista or Custom Cruiser, Electra Estate, maybe a Ford Country Squire or whatever the Mercury version was.

I suppose an Electra 225, Fleetwood, Deville, etc would do fine too. Would a boattail Riviera or a flippin Eldorado convertible be okay? Or Mark IV? Toronado? I mean hell they've definitely got the engine and trans to do it. Wheelbase? Heck aren't they the same as modern 3/4 ton trucks these days? I don't know the factory towing capacities of these things but I figure as long as they have front discs they should be just fine, right?