I swapped a B16A into my GS-R with a buddy of mine. I'll admit that he did most of the work, but I took it all in, and I think I could do most of it myself now. It really comes mostly down to a long list of unscrewing nuts and bolts. You remove the radiator, take off the power steering, AC, distributor, numerous hoses, etc. remove the axles, lower engine mounts, disconnect the header from the exhaust, pull the fucker out (usually with a hoist, but there are other methods), pop that new bad boy in, and reverse the process. If you are handy and not shy about this kind of thing, with a tech. manual handy (preferably a Helms) to have steps outlined, etc. you should be able to do it.
Mine was a "level one," as I was able to use the stock mounts, axles, etc. Just have patience, and leave yourself at least ten to twelve hours for your first one. You may very well need much more time than this. I think my situation was ideal, working side-by-side with a veteran Honda swap master, and getting to take in every detail of the operation. What I learned was pretty much immeasurable
