Dual point kits for the 235 and 261 were made by a few companies of lesser notoriety then Mallory and delco. I have an nos set made by a company called "Renberles Products" of Detroit. They called them Dyna-Flyte model 115-D. These were made in 54 and use stock points. Interestingly enough, the kit fit not only Chevrolet from 33 to 54 (and to 62 although the box stops at 54), Nash 48 to 54, packard 41-47, gmc 38-54 and international truck 41-54.