Nice work! Engine compartment looks original and clean. There is an oddball blue/grey color paint for the power steering pump if you want to go that far.
That fan is not the original flex fan style. I had to look twice, but there are only 4-blades. That's an odd looking fan. Are there Ford markings on it? That's probably worth upgrading to a 6 blade flex fan (preferably Derale brand) of the same diameter.
In your pictures the radiator support looks the same as mine with a 24" wide radiator.
As far as the saddle mounts, here is a link to a few pictures of my Mach 1. You can easily see the upper saddle mount in the radiator cap area.
http://mach1club.com/showthread.php?tid=6141 You cannot see the 2 lower saddle mounts
You can easily count the number of tube rows by removing the radiator cap and looking inside the radiator. You may have to drain some fluid to see the tubes.
I don't think you can get a new 24" wide radiator and fan shroud setup for that budget. Also, your engine compartment looks nice an original. I don't know If I'd want to put an aluminum radiator in there. How about trying this idea. If your radiator is already a three row radiator, have you thought of taking it to a radiator shop and have it rodded out? In addition to cleaning they remove the tanks and push a rod through each tube to be certain they are not plugged. You will then know for certain if it is too small or was simply plugged too much. Having a radiator rodded out or replaced is good practice with a new engine.
If yours is a two row radiator, then I'd go back to looking for a larger radiator. Then you'll have to decide 20" or 24" and the new saddle mounts and fan shroud that go along with a 24 inch.
I see that anti-freeze container in there. Is it still blowing coolant out of the radiator? FYI, on these older downflow radiators without a recovery system the coolant level should be about 1" below the top of the upper tank so there is still some expansion room.
Regards,
Mike