Today I put on the headlights, corner lights and grill - then whipped out the extension tape and weeped :D
Not much room for a radiator, but where there's a will, there's a way.
Basically the hood latch will not be going back on, and neither will the center post between the upper/lower rad. supports. The hood will be closed via flush-mounted hood pins (see last pic).
The room for getting a radiator to fit (without any work other than minor dremel fitting) is about 22"wide and 15" tall. And what do you know, Summit has a Scirocco radiator at 22x13x3 that has been successfully used by turbo KL owners before, so it should work in terms of cooling capacity. It will also work in terms of space, but the only hiccup is that the inlet/outlet are both on the same side. Minor thing.
Aerocatch flush mount pins: