i found a vtec conversion (http://www.modacar.com/products/Acura/Integra/MODAENK , it says B18A/B OR B20 BLOCK USING A VTEC B16 OR B18C HEAD i dont know what this means @ all, and where it asks what model it asks, 1.) LS B20 (82mm bore) 2.)LS B20 (83mm bore) 3.)LS B20 (84mm bore) 4.)LS B20 (84.5mm bore) or 5.)LS B20 (85mm bore) .. I have a 98 ls but i dont know which one to get, help please