to get right to the point i want more oomf outta my 2.5 YJ (as does everyone else) and have been reading alot about the throttle body swap. my question is, can i put the 4.0 throttle body spacer on my stock throttle body or do i need to install the 4.0 throttle body then put on the spacer. this is all assuming my assumptions on this system is correct. eventually i would like to do both but for now would just like to go the cheaper route. any help is greatly appreciated. Thanks!