Missouri battleship 16" turret tank? Yes, I said TANK!

[Rick Lowe]

1/48 Churchill you say...
Would 1/56 be close enough?

https://us.airfix.com/products/churchill-infantry-tank-156-wwii-military-wargaming-plastic-model-kit-402011002

- but there are a lot of other types available too, as it's the chosen scale for the Italeri & Bolt Action wargaming minis.

HTH

[Old Wombat]

Probably a bit small. However, looking at available 1/48 tanks .... Lots of Shermans, T-34s, Tigers & Panthers, with only a smattering of other WW2-ish types.

There are Matildas!

Or, for a more modern look, there are M1 Abrams', Challengers & Leo 2s available (maybe, if you're lucky).

[scooter]

French Pre-Dreadnoughts - When Hotels go to War: https://www.youtube.com/watch?v=9ygXLnRAm-A

Thanks Wombie

[Wardukw]

This is a very interesting idea and i like it.
For a vehicle like what you want to build and if you want to have some realism to it dont use the T28s ..you'll go mad building all the suspension units 
One of Guys suggestions is the way to go..M1 Abrams..Leo2 .
For the realism part and with a turret lenght of over 400 mm and the massive recoil these guns have you'll need a chassis twice that lenght ..so 4 Lèo 2s ..i say Leo 2s cause there cheap to buy and revells are a great start.
Im am specking from experience here as i have built a 4 tracked tank model and its on here in the armoured section.
I used super cheap trumpeter T 55s and 2 tamiya T 62s and a absolute crap load of sheat styrene..it was a big build and this thing was 4 times the size of a 35th King Tiger.
So back to the build 
I really like Guys idea of all 4 tanks being able to turn as steering this thing would be a nightmare other wise.
Hydraulic stabilizers would be needed to support the guns when fired..remember when these guns fired on the ship you couldnt be on the deck dew to thr blast pressures ..your tank would have to consider this sort of thing also..when a battleship fired a all gun broad side the entire ship moved side ways form the blast.
If your tank fired all 3 guns at once it would smash anything near it and destory your chassis's suspension and possiblely twist their frames too.
You also need to make this thing pretty damn high as the turret does not carry any ammo or powder charges so youll need away to carry that to.
So you need a base which the 4 tank hulls connect too..this would also carry the turret so it will need to be super strong .
As for air defences your pretty good there..M16 quad .50 turrets..20mm AA guns and Bofors guns..or hell even a Duster turret with twin 40mm guns .
This will be a bloody big model and i like it