Advantages... well..... it seems that I take the opposite stand then Anders on almost every topic.
Haha! In fact I've got nothing against electronic fuel injection, being a computer engineer I acutally like the idea very much, which is probably because I feel I understand the technology, besides fuel injection is kind of an exact science, where a good carburettor tuner probably needs that sixth sense to make things right. That said, however, the carburettor is just a mechanical computer. Nothing more.
And I have been convinced, that the advantages of the fuel injection over a similar carburettor setup when compared one-on-one are few. If we look at performance, there's no big advantage really, unless we go to extremes and fit multiple injectors to our carefully constructed inlet manifold - but this is professional racing technology, not something we amateurs have a budget for.
Ignition is where the big advantage is with computer control, provided the system has advanced mapping capabilities.
Besides, I know from experience the number of fault sources in an EFI system, and there are MANY. The biggest problem is that most of them cause a complete breakdown, whereas with a carburettor, you can normally always keep running somehow.
All that said, however, since my car is an original Prep 142 I tend to feel that eventually I should bring it back to a state similar to what it was converted to (with the twin side draught solex'es). And for THAT I would pick a pair of DCOE compatible dual throttle bodies with one or two injectors for each throttle, integrated fuel rails, etc. This is a direct bolt-on to the S-style inlet manifold, and can also be fitted with the original airbox or something similar, so it can be made to breathe good fresh air.
MegaSquirt would probably be my choice of ECU unless I could get Ole Buhl Racing to build me something
MegaSquirt is great for a software-hacker like myself, and it does ignition too... a bit crude, unfortunately, but by the time I get around this project, it has probably improved a lot!
That would be an upgrade to the original Prep 142 spec (as the Holbay cam I have is too), and therefore more original. Plus: I would be able to push my NA engine to the limit.
But for now, there's plenty of driveability (user friendlyness) AND fun in the single Solex 34CIC setup that Roy has fitted my car with. I AM VERY SATISFIED with this, and I intend to prove the quality of this setup on a rolling road eventually when I get the time.