It's worth noting that with the Hilborn injectors I have, there are really two choices - the way I repositioned the injectors to fire at the valve, or leave them alone and let them spray against the opposite port wall. There isn't any real way to move the injector up or down, even if I wanted to.
I believe the modern EFI injector has no comparison to the old style constant flow mechanical nozzle. There are a few reasons for that, but the main one lies in the 'constant' part. A flow stream that is not being shut on and off all the time will be much nicer in terms of atomization and pattern. I've seen some videos of constant flow nozzles at full song and they are really putting out a beautiful fog of gas. I've seen similar videos of EFI nozzles and it ain't pretty...especially at lower pulse levels. It's curious that the old Lucas style disc injectors were said to have a better pattern than the pintle style Bosch injectors...yet the Bosch seems to have come out as the dominant style, at least in production cars.
I think a lot of benefit comes from the straight-shot airflow into the port, with no plenum to have to run to, or other cylinders to cause pulsations or rob the air/fuel charge.
This engine won't be held to the same standards of manners that I usually expect when I put something together. But I do think with the EFI I will have at least an acceptable idle. And with the mapping you can do now, there should be no reason I would have any flat spots or stumbles, etc.
This pic shows the injector on backwards; the nozzles are on the outside, near the valve covers. In reality, they will be on the inside, near the lifter valley.
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