This is my opinion. Based on my experience I would look at the 1/2 pickup if my shift points exceed 6000 rpm. If your engine is a low rpm affair and does not exceed 6000 rpm I think a stock system with an attention to detail will live a long life. The reason the 1/2" pickup is so popular is the hemi's came with one. The rpm levels the hemi's max hp were produced made the larger pickup necessary especially when you consider the first two years of production the hemi was a strictly race application. When the engine was civilized for the street it retained the 1/2 pickup developed in its racing trim.