BORGESON steering box

How much smaller is the Borgeson box from the factory P/S one? I got a Firm Feel Stage 2 box way back in like 2009 (which still works SUPERB, feels like a modern car) before the Borgeson unit came out and for my future 5.7 Hemi swap I'm thinking of just going to a manual box with electric power steering adapted out of a new car for clearance in the engine bay.