Here is NISSAN procedure:
You stated: filters, plugs, and wires
Did you replace or check, Cap, Rotor, Vacuum lines & leaks, compression check, etc. since it has been sitting?
Nissan had a problem with the Distributors of that engine & had a program offering rebuilts.With lack of power, it sounds like it can be timing related, but also Distributor Advance Definitely check timing & be sure carb is open at full throttle