I've put particulars on my blog.
Specifically, the problem is the location of the doubler for FI and the doubler Van's has you put in for the carbureted fuel pump, has left me little room for the throttle cable where the instructions suggest it should go (especially if you want to use the SafeAir eyeballs which have about a 1" nut.

Would there be a significant problem in just drilling the hole required (it's a 3/4" hole) through the existing doubler for the fuel pump I'm not using?