You don't need arp studs, but I would recommend them, get them for b18c1/b18c5 engine.
Decking is always a good Idea, but if you are tight on a budget I would't do it unless it needs it.
Now with that particular head that I showed you, it is obd0, so you would have to do 2 things, 1 re-wire the distributor and 2 swap the injectors with your current injectors, there are writeups on how to rewire the dizzy, and the reason for the injectors is because they are not the correct ones to use for obd1, so you just swap your old ones in.
The last thing I forgot all about it is that you are going to need an ECU to run the vtec head, p30 obd1 is what youa re going to want to look for, OR pr3 obd1
you will have to run a couple wires also for the vtec head, but it is just 3 wires and a ground and that is also in the refrence section.
Any other questions feel free to ask