ZZP isn't very familiar with the Series 1 at all, and only recently started selling pulleys for it. I don't know of anyone running one of theirs.
Most 94/95 L67'* go to the stock 92/93 pulley at 2.5", or a 2.5" from www.pulleyboys.com
but it'* very important to understand whether your fuel pressure is good enough first, and you must have a scantool to check for KR afterwards. Be prepared to spend more money to kill the KR if you get any. So simply put, if you pulley, don't let that be ALL your budget. Have a couple hundred more around in case you need it to battle KR.
Assuming your fuel pressure is good, and you have no cracks in your exhuas manifolds (these are VERY hard if not impossible to see while they're on the car), you'll PROBABLY be ok to a 2.5" pulley with plugs one heatrange colder, a 180 thermo, intake, and a high-flow cat (preferred).