Doesn't look like that will clear enough space. I've got a knackered old 240mm radiator (that I'd not put near an actual system, and only have because I'm a horder) and even if you have it flat against the back of the case, it would still go slightly over the power supply. The power supply cable on the rear stops you having the rad right to the back unlesss you have it off centre.
Might be able to get it to work with a slim radiator and/or slim fans and potentially rerouting that power cable. Something to experiment with for sure! Probably preferable to run with a slim setup to not obscure a lot of the motherboard too from a visual perspective.
edit.
XSPC do a 20mm slim radiator, add in some of those decent slim Noctua fans at 15mm. That's only 10mm deeper than the stock fans. That sounds doable