[Luce]

With megasquirt, it's far less critical than anyone will lead you to believe. As long as your injectors are matched and your butterflies are well synced, you can use just one header pipe... so long as you're not running on the ragged edge of lean. Your challenge will be the plumbing to get a good smooth vacuum signal, or are you running only Alpha-N.

If you want to put your mind at ease, you can put a bung in all pipes and move the sensor around to be sure they're all uniform.

I have mine welded into a pocket parallel with the pipe. It reads a little slowly, but you can filter that out with the tuning software. I'm really not concerned with running closed loop though. Closed loop really isn't so easy with a lopey cam anyway.

Megasquirt rocks. You can do all sorts of extra things with it that you can't with the others. Especially if you're running boost.