what is the difference between the zex dry kit for different cars...is the NMU setup differently for each of the different cars they make them for or are they all the same with just different length in hosing and wiring...the reason i ask is i am looking for a used zex kit for mustang but there is rarely one on sale on ebay and they are always more expensive than the other kits...could i use one not specified for a mustang??? anoyone know??