Almost any location that has hot water behind it can be drilled and tapped for a temp pickup. I did so on my 413 on the 300L in order to add a digital water temp guage in the ash tray. I hired a machine shop to do it but could have done it myself with the proper tap. Can't recall exactly where the hole was made but it was on the housing that the water pump is bolted to I think. Larry W Jett 950 Woodside Road Suite 4 Redwood City CA 94061 650 368 3966 [Non-text portions of this message have been removed]