Hey guys just wanted some opinions on what I should do. My setup is a stock 5.0 with on3 70mm turbo. Car makes 453rwhp and 550rwtq. Tq comes all in by 3k and hp drops off at 5k. I have a c4 in it with TB and 3.27's out back, 28 DR's. I have had 3 converters in the car all from the same company. The first one stalled at 4200 on TB. Way to high for this little stock motor. I would be at 6k just past the 1/8 mile. Then we went with another and it stalled at 3800 on TB. Then we tried another and its the opposite, stalls at 1800 on TB and will not build boost off the line. Our target was 3k on the TB. What should I do I'm tired of doing this over and over. Should I try someone else?