I need a powerful and reliable on board air system, I am currently using my modified stock GM A/C compressor. My neighbor gave me a York, but it turns out it is a 206, the mini one which I feel will not be fast or powerful enough. I am really leaning towards the Trailhead compressor on Onboard Airs site. The problem I have with the Trailhead compressor is the cost $850 is pretty steep, I have no problem spending money on a good product, but this better be a really good product at that price. I really do not want a belt driven unit either, just because of future engine mods. Open to any other ideas anyone has.