Try searching for ls/vtec conversions. The swap is very easy, the wiring varies depending on the car/engine harness/ecu. To better help you out a little, I will list the main changes that need to be done IF you are not touching your bottom end whatsoever (though you should).
B16/GSR/ITR head complete
gsr water pump
gsr timing belt
ls-vtec conversion kit (includes dowels, HG, oil feed)
ARP head studs (specify gsr when ordering them regardless of the head)
Since your engine is an obd0, you will have to use an obd0 distributor.
obd0 b-series ecu that supports vtec
If you can find a first gen b16a1 head complete, I would pick that up. Probably cheaper and is obd0.