Howdy,
Indeed you do not need to remove that to remove the stock radiator.
If you do indeed want to remove it anyway for whatever reason you can buy the quick disconnect tools for between 5 to 15 dollars at any autopart store (i got my set at napa for 8 bucks).
Usually that connection is for lines that contain a fluid under pressure -- such as a/c lines, power steering lines, fuel lines, etc.
You just have to drain the radiator at the petcock, disconnect the two hoses, and if you have tranny lines going into the radiator, disconnect those as well.
Then undo the bolts holding the overflow resevoir,the fan shroud and the two upper hold downs, and boom it comes out.
Simple as that.
Be sure that if you get a replacement that is aftermarket, that you get one for the vehicle. Some more expensive replacements like Be-Cool radiators do not have any of the sheet metal/aluminum at the top to mount the radiator like the stockers have.
So you have to end up fabbing something up.
Not too hard, but again, a pain in the arse if you buy something and then realize its not just a straight up drop in replacement.
I have a be-cool, and although it was expensive, my car never overheats, I beat the ever loving crap out of it, have a turbo 408 stroker in the notch that the radiator is in, and a 180 t-stat. Daily driving in bumper to bumper traffic on a hot, humid day like today was, is no problem.
Just my experience, sorry for the long winded post.
Best Regards,
Gered