I'm experiencing the same problem. I've tried 2 txs hpmbc's and a greddy profec b. Same problem with both. I try to run 17-18 psi in 3rd and hit 22 and fuel cut in 4th and 5th. I'm going to try to port the wastegate soon and I'll let you know how it works.
btw, I'm running a vf30 w/txs dp