[cycleguy55]

Originally Posted by Tom Wells

Brian,

My memory may have it a bit inaccurately but a Holley throttle body is somewhere around 1-1/2" shorter than a carburetor.

The MPFI throttle body measures 2" from manifold flange to the air cleaner flange. The newer "all-in-one" EFI units measure from 3" to 3-1/4", closer to a carb's height.

With the MPFI, the injectors are in the manifold vs in the throttle body for the all-in-one units.

Overall height also depends on the type of elbow (e.g., round or oval-shaped) you choose.

Hope this helps,

Tom

While a 2" high throttle body is better than the standard height, I'd rather use that for a more gently curving inlet elbow and/or a raised carb pad. YMMV