i'm experimenting with a seat marbella radiator at the moment, fits vertical right at the front of the chassis on a wishbone 2b,it's a two core aluminium job, the connections are the same size as the sierra and in roughly the right places.
got it fastened to a nissan micra expansion bottle and i'm tryin to find a front mounted fan to blow through it.
this set up will give me shed loads of room between the rear of the rad and the engine for other odds and sods - will keep you posted with how I get on.
steve