There's enough room to fit about 1-1/2" larger radiator, but it would put it up against the U shaped lateral support and would block air from that section of radiator. If that support was tubular and was angled more forward, then you could. I've never thought about doing this though
Where it actually gets hot (read: Phoenix) even the SVT radiator isn't ideal, though it is usually adaquate. Mid-summer with the A/C on and stuck in traffic... the heat even over powers the highspeed fans. I replaced the oil/water cooler with an oil/air cooler.. so I'll see what difference it makes this summer.
