I don't know if called this the right thing.
There are real advantages in giving each cylinder it's own fuel, no starvation, timing, etc.
As I'm going to be converting my car from diesel & fwd to 4wd, I've got to change the fuel tank anyway. So, may as well ditch the fuel tank altogether & put the LPG tanks there instead.
I've also gotten used to doing 700+km on $50, so would like to keep this fuel down after the conversion.
I also want to add forced induction later, either supercharge or turbo (probably supercharge as it will be a lot easier to do to the engine I'm thinking about) & I don't like the idea of having fuel passing through the supercharger (particularly LPG).