don't know if this will help but importtuner put up an article a while back on the k20 swaps for the fit...its pretty detailed in its explanation...after looking at it be ready to do a lot of cutting, because the exhaust manifold or headers dont fit the Fit for the k20 swap...btw gettinafit, what'd u do with the radiator and condenser fans for the swap?
Honda Fit K20 Engine Swap - Import Tuner Magazine