Once you get into a specific EFI system you soon realize it really isn't complicated at all. Not as much "zen art" into it as tuning a carburetor and recurving distributors, that's for sure! Never mind that you can't change much on the factory EFI systems... you can "tweak" them once you figure out what they're doing. Crankshaft sensors can be moved a little, and a resistance or voltage changed here and there to make a big difference. Or go all out an get a programmable system and connect the laptop -- easy fuel and timing curve changes! But those systems cost $1000+ depending on how far you want to go. But try www.megasquirt.com
(or search for Megasquirt) and www.sdsefi.com
. The SDS system is one of the best DIY installer products out there.