the throttle body on the base/limited crossfires (m112) has a smaller I.D. and different part number than the SRT6 (m112k) throttle body. the SRT6 throttle body can be swapped over to the base/limited engines as it is a direct fit as far as the O.D.
https://www.needswings.com/throttle-body-upgrade-m112

the SRT6's can be upsized to a later generation mercedes v8 throttle body with an even larger bore. we have a conversion kit for that at
https://www.needswings.com/needswing...e-body-upgrade