The technical specifications i can't explain but there are 2 systems in the netherlands.
One system is with a mixer and is mostly used one carberateur engine.Ther is also a system like the mpi.Thats lpg injection.When you look at the picture from my engine you see 8 lpg injections and at the wall there are the converters.
Ill try iff my friend can type something abouth it.He is the one of the guys who can build it inthe Netherlands.
this is a lpi system
this is from a ly6 engine
this a mixer system on a gm 350