A small block dizzy is a drop in fit for the 241/270 Dodge hemi's and poly's. The tall deck dodges, the 315's/325's, are like the Chrysler and Desoto hemi's, they require a different length intermediate shaft to work. And the tall deck dodges, the low and tall deck Chrysler's, and the low and tall deck DeSoto's all take different length intermediate shafts.
But I assure you, you can take a distributor straight out of an LA 318 and drop it right into a 241 or 270 Dodge Hemi or poly. I did exactly that with the 270 in my girlfriend's '55 Coronet.
