For the first question. You don't have to use the teg radiator, and if you still have AC you can't. Its not a drop in afair, and if you do it you need to take off your bottom mount holders (whate ever you want to call them) and move one about an inch or two towards the passenger side, the other about a foot or so. You have to either secure them by nuts and bolts (drilling require) or welding. When I did it, I had my freind help me weld them on. Also the top holders have to be fabbed up some way. First time through, I just used some shitty sheet metal. Later I made a much nicer peice out of some aluminum and a metal bender. However, again, if you have AC, this is completely out of the option. Your stock raditor will be fine. If your running into cooling problems, you can go the OEM route by buying a del Sol VTEC (b16a model) or an automatic civic radiator. Both are Dual Core which offer much better cooling then the stock civic single core. If your going turbo, defently step up to a really nice aluminum aftermarket raditor.
As for doing the swap your first time, if you have the right tools and you don't have any hook ups, it doesn't take too long. You can easily have it done in a weekend. Doing my next swap, I hope to have the engine out of the civic shell in 2-3 hours, 3 for getting my GSR swap out of my sol, and another 4 to put the GSR engine in the hatch. With a manual, its not too hard if you get stuck.
