I used 3/8" stainless from Jegs. The rigid 37 degree flare tool worked great on this stainless, pressure tested to 140psi. I exited the tunnel opposite the Bowden tube / throttle tube. This picture shows one line plugged, the other with a barb (temp situation to run carbs).
![](https://farm8.staticflickr.com/7610/16619568827_acf3378c7c_z_d.jpg)