I'm looking at buying the Accufab twin 60mm TB for my Mach 1 but have a few reservations and was wondering if anyone who has purchashed this TB can give me some feedback. I installed a BBK twin 62mm TB some time back. I did see a 10hp gain but I eventually had to throw the stock TB back on due to idle problems. No matter what I tried I couldn't get the BBK to idle below 1500rpms. It would be fine for a day or two but would get all crazy on me and stay that way for a bit and then be normal again. I went to every performance shop on the block and nobody could figure out what the problem was. Has anyone had these problems with the accufab? and any suggestions on how to fix the problem with the BBK?