Again, a single 480 isn't going to be all that the OP needs for dual loops, if that's what he's going for. It is a single radiator and a dual loop is defined by having 2 sets of components that run independent from one another...so you would also need another radiator somewhere. I think we're getting too hung up on only fitting a single 480 when there are many other options that could be done for this setup that do not require a 480 rad. A 480 would be fine if you were going to run a single loop or a hybrid dual loop, but you're effectively 'sharing' the single 480 radiator, which isn't (by definition) a dual loop.