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Go online and search for close loop conversions for jeeps. I believe you have the closed loop setup and everyone I've talked to and every article I read says they are not too effecient. Once you found the articles and you see how easy it is, go to AutoZone and order a GDI 3 core radiator for 92-96 (93 for sure). This should only set you back about $215 out the door. You'll end up paying around $190 for a factory 1-2 core, so you're better off getting the 3 core. Until then, I'd say put a 160 thermostat and some water wetter in. Another neat trick is to run a remote transmission cooler to avoid the transmission heating up the radiator (assuming you have an auto). Jegs and summit have kits that even have the correct conectors so you don't hav eto chop up your lines.
I have also heard of people putting washers between the hood and the hinges to raise the back of the hood enough for air to flow through it. That last idea is alittle iffy, and if you do it I'd go get some slighty longer bolts for the hood when you put it back on. Be aware that this will let water in when it rains.
That's my $0.02[addsig]
