My two cents....
SUPPLIERS
There are two well-known American suppliers of aluminum rads. Griffin (1) and Ron Davis Racing (2), both of which have supplied many other marques for many years, much longer than such things have been available to the UK market.
And I have found that both American and British enthusiasts prefer, for some reason, to buy local as a first priority, over all other factors. The biggest US supplier, Morgan Spares sells RDRs.
I have bought from Mulfab (3) as well and they turned out the most effective and the cheapest at the time, even with shipping to Canada.
However, I have not checked the new prices from Mulfab since Peter sold and no idea of the quality or service today.. The do us Peter's designs which incorporate his extensive experience. I have bungs for rad fan switches placed both top and bottom. I can then play with placement of the controlling switch to see which I like more and leave the other as a back up (I can merely change the wires or the feed.). Alternatively, there is an Australian mogger who came up with an inexpensive idea that allows one to tailor the fan function to each individual car.
https://www.gomog.com/allmorgan/EngineCoolingFanControl.jpg I like it!
RADS VERSUS RAD FANS
There are two heat problems that must be controlled. Engines are best when operating within a tight range specific to the engine and its set up. One occurs when the car is moving and there is airflow and the other occurs when there is insufficient airflow, (when the car is not moving or moving slowly). Measures must be taken to achieve the desired range in ALL ambient conditions.
Both improve when there is a better radiator but the second situation is more effectively dealt with a fan, assuming the tuning has be properly done. I have been using the same brand of fans that the MMC adopted in the very late in the day. However, my fans have a greater capacity than theirs. SPAL. Check the CFM they push and choose the most powerful. Classics have a engine bay designed for 36 bhp. The difference is cost is minor between CFM. So check the fan make of the radiator manufacturer you choose. They can fit a SPAL or you can have one sent to them.
Improving the rad without addressing the fan capacity invariably leads to frustration.
