I have purchased one engine from White Performance & Machine Company, and I am extremely pleased with it. They did a custom engine for me to go in an air boat. It is great. It works extremely well. I called and told them what kind of motor I wanted, and they built it to my specifications. They really know their engines. I talked with Greg, the shop foreman, and he really knows his business. He took the time to talk with me and find out exactly what I wanted. I recommend them to anyone needing a custom motor. The motor arrived right on time and they took great care in crating it, so it was not damaged in transit. I have recommended them to several people already.