I know we have argued this long and hard in the past, but red coolant in a 20 year old motor? What is SO special about a cruiser that it won't run on Halfords antifreeze. A new Lamborghini, Zonda, Ferrari? Maybe. But a big old truck engine like the 4.2. I just find it hard to believe that it really need something scraped from the wings of an angel under a full moon. It's my choice entirely, but I stopped lining Mt T's pockets for his special Snake Oil along time ago. Oddly, I haven't noticed any side effects to that decision. It's more important to keep the rad clean and clear I think. I off road my old beast as you know and it gets a work out at very low speeds with no driven air cooling and it never gives me a moment's problem.
C