High performance and Pantera's of nominal performance are both prone to overheating and heat soak. I think that fact is well established and everyone understands that. The cooling mods listed on the cooling sticky are factually beneficial. I drive my car every day,... every day, and have for about 15 years. It has a mild 425 HP and I can tell you for a fact the swirl tank mod was critical in the drivability of my car. My car is well behaved and the engine is quite comfortable in it's surroundings and on many days I do not even require the fan. This was not the case before, I regularly make trips and hour south of here and the car was prone to heat soak. The swirl tank mod fixed all of my cooling issues. As someone with years of daily seat time in a Pantera I would not build one without the swirl tank mod. It is standard procedure.