replacing radiator after meltdown

[BigRedSled1985]

Well, after over a year, i am trying to get the big red sled back up and running, went out and checked the damages for a major roadside meltdown after the wife drove the truck with the fan belt off for two mile and the radiator split wide open.

At the time, i feared the truck engine had busted/cracked due to a lot of smoke and a report of flames from the roadside when the wife stopped and had a fire truck hose it down, but now after getting back in there and tearing a few things apart, it seems the engine might be fine. when i put a belt on it, just the crank/water pump/alt belt alone, and cranked it up after checking fuel/oil/and putting water into the radiator (which promptly ran out of three large cracks/holes in the sides of the radiator, but i knew that was a goner) it cranked up with a little splash of gas into the carb and ran okay.

i ran it for about 30 sec got some smoke off the pass side of the motor but it seems it is left over from the meltdown, maybe even at the most a leak of oil out of the valve cover which can be remedied with a new gasket.

sooooooo... all of that to ask these questions...

1. when replacing, what radiator to go with? i am looking for foremost CHEAP because i have to be frugal getting this running again, but i do not run A/C oin this truck, i have an aftermarket trans cooler bolted in front of the radiator bypassing the origianl in-radiator system completely, and want to make sure this truck stays cool... any other year truck's radiator that could swap out that has more rows/better cooling?

2. no noises from the engine (other than the sounds of a tired motor), and the oil is not milky or watery, any other things to look for as to signs of motor damage from the overheat? as stated, from when the belt went off to stopping and turning off motor was about two miles in July 2009, not a very hot day but steam filled the air from the radiator popping and fluid squirted everywhere on the roadside (as per wife's statement)

3. water pump spins (filled empty radiator with only garden hose and when engine turned back off greenish water ran from leaking holes, so i know pump was pushing water into motor and out into radiator with coolant in it) how can i tell if pump has issues?

4. any flushing chemicals recommended for motor or cooling system after new radiator found to remove yuck fluids or treat any other issues with burned oil or fluids? just want to be safe (trying to salvage motor part of this equation).

thanks in advance for reading this and any assistance!

shaun