suddenly youll find that the ma61 radiator is physically LARGER than that found in front of most 5.0L's, not only that, but toyota cores have their cooling vanes closer together - 14mm compared to 10mm (or something like that) so core density is WAY up. generally the stock ma61 core (provided it gets good airflow - my pity on all you sods with intercoolers and aircon gear in front of your rad - no wonder they overheat!) is PLENTY good enough for almost all applications.
a 3 row will be your best best @ about $340 (syd prices).
But, alas, I suspect young robbo here will look at a VN or VL radiator, and think "errr, um, wow, its big" and put it in anyway.