So, I got tired running useless low flow slim line fans and I think I have found a good fan that can handle the VR4's cooling requirements and still fit the AFCO radiator. This fan can only be setup as a puller but should leave room for your typical T3 or T4 bottom mounted turbo. It's the SPAL 30102800 11* HO fan.
If you shop around, you can find it cheaper. This sits perfectly on the AFCO radiator's core. I suggest fabricating mounts for it. It's beefy as hell, makes my old slimline look like a toy. It's heav(ier) and relatively thick. I already had the fan mounted on the radiator (engine was out) and doing quick math and crossing my fingers, the engine dropped right in and I had maybe 1/2 an inch to spare. Closest distance being of the fan motor to the compressor housing of my PTE turbo. I apologize for the low quality photo from the cell...but you get the idea. The setup is also staggered so I don't have to worry about too much about heat from the header.