It's a bit complicated. What I do with the twister manifold, is I make a small dam that will only allow a small headed screw to hold the manifold on. I then fill the pulse hole and that dam area with JB Quik Weld. Sand that down for a nice smooth manifold surface. Then use a drum sander in a Dremel to open the manifold adapter throat up to the same diameter as the carb. Then you can tap the fuel pump cover of the carb, and run an outside pulse line to a pressure tap in the crankcase. You can add this pressure tap anywhere in the crankcase that is convenient. If I get a chance, I will post a pic of one I just did as described tomorrow.

AV8TOR