I had the Fluidyne radiator installed before I found out that there are other options out there, including re-coring the original with a modern core.
I’ll have to look at the water pump, but I’m able to run a mechanical fan on mine with a very small clearance. I also got a six-blade fan from a Ford parts place in Ohio. I don’t recall the exact specs off the top of my head, but it doesn’t need to be trimmed to fit in the engine compartment, unlike the $200+ ones you see that have been trimmed to fit on eBay.
Drop me a note if you need more info on it, best of luck.
1965_sunbeam_tiger at earthlink.net