So, where do you live? How hot does it get? These could be answered if you filled out your profile.
Ok, I'm down off the soap box, I have been there, done that, got the Tshirt and used it to wipe up the antifreeze. I have a 383ci Chevy in a `62 CJ5, I have cut holes in the inner fenders, tried a pusher fan in front, tried a homemade shroud, still it ran at 210* in 90* weather, 230* at highway speeds. The electric fan started to wobble and rubbed a hole in the core, (I had a 3 core `64 Impala radiator) I tried soldering up the hole and ended up mounting the radiator a little out of place and the fan grabbed it and the rest is left to your imgination. I priced a new, "Impala radiator" it was priced at about $235.00, I checked with my local speed shop and found a, "Howe Racing" aluminum radiator for $175.00. This radaitor is about 17"h x 23"w x 2" thick, it has 2 1" cores in it. http://www.speedwaymotors.com
has about the same radiators starting about $149.99 These don't have tranny coolers in them, they cost a bit more. Now, I can run 75mph shaking and rattling as I go at 175* all day long. This is because I have a 175* stat in it, it would probably run cooler with a colder stat. I need to put a shroud back on it because after getting off the freeway it will raise to about 195* for the first 10 minutes. Remember, that doing the hot weather a 30% antifreeze and 70% water will cool better that a 50-50 mix. Also, if you go with an aluminum radiator use only distilled water to prolong it's life.