AWS-Z28

I just finish installing the LT4 Hot Cam kit. Also updated to the vented opti during the install. Now here’s the problem. If I’m at a stop light, my car really wants to pull forward. I have to apply more (a lot more) pressure to the brakes than before. Another issue is that if I’m @ 45 MPH and holding steady I can feel a surge in the car. Once I increase speed to 50 or greater all is fine. Also below 40 I have no issues. These are all new since the cam install. I did get a new tune (from pcmforless) to match my setup. Seems to be working great. I’m starting to think I need a new torque converter with an increase stall speed. I have a 93, so it has a 700r4 in it currently. The tranny is NOT slipping at all. This car is my daily driver and I don’t race on weekends. Just like to know that I have a fast car and could hold mine own against others. If anyone can help, please reply. Thanks