I think you should review the forums on the MegaSquirt site. There is a steep learning curve but many people have got them to work just fine. I bought a kit about 6 years ago but ended up selling it before getting into it too deep. If you want to learn all there is to know about EFI and enjoy designing and installing it yourself, and sorting out fuel maps etc it will be a great project.

My guess based on your question is that you might want to look into the EZ EFI by FAST. In the end it will probably cost less.

Scott