Fernox traditionally make an corrosion inhibitor for central heating systems. They also manufacture numerous other products aimed at heating systems and may include an anti-freeze for solar water heating. I'd suggest these systems are not dissimilar to car cooling systems, but they're different.

Wouldn't you be better approaching a car anti-freeze manufacturer and asking them?

I would agree with the above, a standard antifreeze + fernox would be a belt and braces job, fernox is not an antifreeze of course.

When I remember side valve Fords most people couldn't afford antifreeze so they drained the water out every night - or forgot, you could usually get away with replacing a couple of core plugs.

The old Fords had cast iron in the block and copper(& brass) in the radiator-a few rubber hoses and that was it..Not like nowadays.Yes,modern petrol has minimal lead in it so valve seats will not last as long but they're hardened to make up for that.

http://www.fernox.com/files/Fernox/Content/PDF/English/Alphi%2011%205L.pdf

Above is the stuff......apparently [I haven't asked them]' it is what Rolls Royce recommend.......

The problem using modern OAT type coolants in old cars is they eat away at the solder on the radiators.

A friend of mine was using fernox in his 1960's Hillman 20 years ago and as far as I know he still does.

The Ford side valve engine I am familier with didn't have a water pump so there was only iron and copper in which case the above would be useful, but if this is some special application I would guess you have a plastic/aluminium radiator.

The water pump was an export item...separate from the engine block [unlike the 100E sidevalve motor].......not fitted to [UK] production cars.

The radiator is an item from the same period as the engine, so is soldered. [I know..I've repaired it]

BAck in the 1950's, and onwards..the Ford sidevalve engine/driveline [and associated chassis in some cases] was seen as the ideal way to produce one's own special.

Indeed, major sports car manufacturers [or, what they became?] all used the Ford sidevalve engine [in both forms]..and gearboxes for cheap, reliable running gear.

These include Morgan, Lotus, Dellow, Buckler, TVR, Rochdale, and a multitude of racing car makers.

The original cooling system [thermo-syphon] wasn't appropriate for low bonnet lines, so water pumps were added to the E93A [or, more appropriately, 10 HP] engines.

After-market pumps were also available [Aquaplane is one]...but these were made in alloy, to be significantly lighter.

Soldered joints could also be found on things like 'header' tanks, pipe unions, etc...so even if a modern radiator was fitted, consideration still needs to be made regarding what stuff one fills the cooling system with?

Same with stuff like gear oil, etc!

My first car was a '39 Prefect, very basic but to own a car of any sort in the '50s was a result.

One issue with having no water pump was no heater so I made up a metal plate to cover part of the top of the radiator and fitted a length of trunking from the hole in the middle to inside the car, not very effective but it stopped you from getting frostbite.

They were the days! You could up the output of the dynamo by connecting the third sliding brush direct to the output.

I had a chap make up and 8 volt battery for mine, four cells of a 12 volt case, that improved everything but the charge rate, that's when I did the above mod.

Yes, that too.