I'm not worried about breaking the speed limit, and I have Virginia Antique tags so I don't need an inspection. This might seem silly, but I was mostly worried about driving it too hard. I can't tell how fast I am going, it raises the devil no matter the speed, and it's been so long since I actually drove a truck of this era I can't tell what I'm doing. No matter when I take it out, I'm always holding traffic up, and I don't like to drive slower than necessary. On the other hand, I don't want to flog the poor old thing to death. The tac sounds like it might be the answer. As long as I don't over rev it, then I should be ok. Is it hard to hook up? Does anyone know what the red line on a 235 motor would be? Thanks Allen