in all seriousness, knock is not as bad as everyone makes it out to be. 3* of KR on a 3.4 pulley is not that bad, but it is not ideal. everyone is just looking out for your and your motor's best interested in keeping the knock low.
your best option is to throw as many mods at you can at your engine before dropping pullies until you can scan. widebands are almost necessary past a basic 3.4 setup because of tuning purposes. you wont blow your car up on a 3.4, but you will on a 3.2 or lower without much effort. find a way to scan and tune before you get to this point.
