My opinion is if your tight on money at the moment don't do engine swaps. Instead get the car on the road with an L-series engine, maybe do some cheap mods that can help performance, like some mild port work, a camshaft and electronic ignition with a good tune. Enjoy it and drive it around, save your pennies for the engine you want, do your research and then make a decision after talking with engineers.
You will need uprated brakes, suspension etc.. with an engine swap it will all add up quickly. Also a Z standard doesn't have an LSD so you won't be able to easily get all that power to the ground anyway until you fit an LSD and maybe also improve the rear drive shafts. Reality is, it's going to cost you good money to do it right.
Hence I'm of the opinion that you should stick with the original motor for now and do your engine swap later. University Students also need beer money .