Man, I am still trying to get this thing to run right under boost. In the last few months I have replaced the valve springs, tried another new GM coil and ignition module from NOS4GN, replaced more vacuum lines with silicone lines, did the air leak test through the intake, no obvious air leaks. My scanmaster numbers are spot on, the int and blm stay at or close to 128, my airflow never reaches 255 at WOT, but stops at about 240, and thats with a new 3.5 inch LS1 MAF. The translator plus is set at all zeros, so no additional fuel or timing. It starts stumbling about 3 minutes after I start driving it. For the first few minutes, I can hit 15lbs of boost and it runs good. once it warms up, it might stumble before I even get to 5 lbs of boost. I have new NGK 5U plugs, 10mm taylor wires, rebuilt turbo, no more oil in the intake, new TB shaft seals, new Racetronics fuel sender with walbro 240 pump. and lots more. Could a bad torque converter cause the car to stumble? I ask because I have the infamous ticking sound down there. As far as fuel, its set at 42 with line off, it climbs to 50psi at about 5 lbs of boost, and to about 58psi at 15 lbs of boost. Ive spent 2 years trying to make this car run right. I really want to get this done before I start thinking about body work and paint. Everything works on the car and Im determined to get it right. Any advice is well taken.