Small Block, Meziere Pump, and Electric Fans-Radiator Fan Combo
I hope this helps.
Here is a photo of the old set up I had on my Duster about 15 years ago.
If I remember correctly, it was a factory size small block rad. Though I do not remember the size of the fans. They did fit, but it was very tight.
It is quite different now. However it still has the Meziere WP and Electric fans.
I took some measurements for you:
Rad: 26" wide, 3" deep (2 core)
Both fans are 12" (Spal)
I had the Waterpump upgraded / rebuilt a few years back with a larger, higher flow motor and is a bit longer than it was in the first photo above. At present it sits about 6.5" out from the engine.
As you can see it is a very tight fit, but totally doable.
...Don't mind the clutter! I am doing some electrical work!