Hey Rich welcome to the club first off.
But you can't run a 3.0" pulley without risking serious damage to your motor. Even if you put it on your car your ignition will retard to the point where the 3.0 will perform worse then a much larger pulley.
May I reccomend a 3.5" or maybe a 3.4" but you have to make sure to free up your intake drop a colder thermostat in and 1 range colder spark plugs like Autolite 104s Or NGK tr6s. A rule of thumb when modding our cars is the only way to know what is safe on our cars is to scan with a scan tool; each car reacts alittle bit different to the same thing so only use our mods and advice to help interpet your scans & adjust acordingly.
Give the Intense site a look over like Rogue had mentioned
1998 SSEi The Executive Hauler
Built Trans w/ 3.29s, P&P Jenny 5, S1X cam, Silver TOGs, Northstar TB & LQ4 MAF, FWI, Dyno tuned, #60 injectors,Oil Pressure Kit, 2.9-3.4MPS, MagnaFlow exhaust, 3" HF cat, MSD Coils & 8.5mm Super Conductors, AeroForce, only Sunoco 94, 100