Hello, I recently bought a set of under drive pulleys for my 2003 GT off of ebay. The ones I bought are supposed to be BBK but I'm suspicious. Well, after I bought em' I looked up the pulleys and found out they are actually a set for a 99-01 mustang, I belive. These use a piggy back system, which I also found out sucks. I was wondering if there was a way I could get them on my 03 GT, but it looks like the water pump pulley will rub against the block before I could get it on the shaft. Because the underdrive water pump pulley is the bell kind, not the simple rim kind-that looks like a hoop. Any ideas?