Hi Neale, sorry to hear about your job

but to answer some of your questions - my van is around 16' long and 7'6" wide (very wide) so similar in length to yours. The axle I used is a one piece heavy duty unit running ford bearings and gives a 1,400Kg rating. My van was already running 14" rims, so the LT tyres I've fitted are rated to 925Kg each. This gives me a good fudge factor above what it actually weighs - which is 1260Kg over the axle and 150Kg on the draw bar for a gross mass of 1410Kg. This was weighed fully loaded, 2 full gas bottles, full water tank, food and clothing for a week, so I know this is my maximum weight.
Thanks Gav, my van is 15'6" by 6'10", so very narrow. I almost don't need extended mirrors as I can see about 20m past the van and if I give it a wiggle (a truckies trick) I can see behind me easy. I had to buy tyres urgently because it was hot and I had to drive from Frankston back here, and didn't have time to look around for the best bargain. My tyres are rated to 760kg each so if I get an axle like yours I am still OK.
Cost of the axle, with new over ride brakes was around $400 IIRC, but it could have been a bit more, I really can't remember and I don't keep receipts. Fitting this, and using slightly higher profile tyres gave me a lift of nearly 5 inches from where it used to be - a real arse dragger. Now I have plenty of clearance, and it tows level, even behind the 101 and other 4wd. (Actually was towing it home with the 101 today from Wombat)
I have found a similar axle to your pic for $460 down in Braeside, so that should give me about 4" lift. Mine drags it's arse as well and the water tank is more round shape than flat and the outlet is about 130mm off the ground.
The timber floor on mine is the factory floor and is in reasonable condition. I have no plans to replace the floor or to paint the underside for the time being. My theory here is that it has lasted more than 40 years without being painted, so I'm not going to add weight down there for no appreciable gain. It has only been towed in the rain once since I've owned it, so it doesn't get wet very often. I still have sections of the chassis to clean and paint yet, but that's about it.
After walking around in mine for the last couple of days, I am going to have to remove the open area floor and fit some new ply. At one stage today I thought I was going to go through the floor. Don't know if I will paint it or not yet.
Your van probably isn't insulated - as Chucaro said, Franklin vans are made of a composite material with a foam core, so they are by their very design. Insulation keeps the condensation out and is worth doing IF you're going to pull any wall sheeting off. Insulation does very little in keeping a van cool when it's hot, or vice versa, so if you're going to be living in it when you take it North, fitting an AC would be a good idea if you're camping where there is power.
If the insulation doesn't keep the van cooler, then I won't bother fitting the insulation, just more work. It looks like it has had a lot of condensation as the corner timber is water damaged. So I might fix that up and then leave it as is. I have plans of using a portable air conditioner while up north, they are good for about 22sqm, so should cool the van pretty well.
Head over to the Classic Caravan Forum -
Home | Classic Caravans - and have a look around and start a thread up on yours - there are heaps of good people there (Including a few of us from here

) that will be able to offer other advice.
I spent most of yesterday over there looking around, only two posts on Roma vans. 
Read the whole lot of millard1399's rebuild of his van, that was amazing. 
I did notice a few of the same user names from here.
If you're up for more reading, the full rebuild of my van is there - all 240 odd posts -
My new (old) '75 Franklin. | Classic Caravans
I'll check that one out, I like your shower mod
I update this thread with more detail. And more often than I do with this one.
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