This may have been asked and answered, but I don't know. I did a search and didn't find anything, but I'm not exactly sure how to word a search for this question, so here goes. 1948 Chevy 6400, has the two speed rear end. The high/low shifting is vacuum operated by a lever on the dash. My question is, can this system by converted to an electric switch, instead of vacuum? If so, would it be possible to take the switch off the dash and replace it with a more conventional switch clamped to the gearshift lever? Thanks for any help you can give me. Trucks of this vintage and size are kind of new to me.