I am going to drop in a B18C4 (Comes from a UK Civic '97 VTI, 99% the same as a B18C1). Simple, straight forward swap in every way. I have just 1 question. I wish to retain my airco system. I'm wondering : what do I need to swap the pump from my puny lameass D15B7 to my elite B18C4? Are conversion brackets enough or do I need to get a new pump? I'd rather keep the pump, so that I don't have to purge the system!