you may not have to, you already have the pump you just need the set up with the reg. I have his system on my car and i am not using a walbro pump,, I needed it for the V8,,, he did say to you"shoot over a datalog and we can discuss what is happening - rob" he is willing to help, and between him and Rudy,those two know more about a crossfire than all 8000+ forum members put together. jim