From this listing, it looks like only 14 Hilborn units were made for the Dart: https://bringatrailer.com/2016/09/12/hilborn-injected-mini-hemi-v8-1960-daimler-dart-racer/ You may have to go into the hot rod world to get some advice. Try here: https://www.alkydigger.net/technicalinfo.php and go on the HAMB and do a search for "Hilborn" https://www.jalopyjournal.com/forum/forums/the-hokey-ass-message-board.5/
What did Hilborn say about running it on the street?
Their website suggests they aren't keen on the idea.
https://hilborninjection.com/mechanical-tech-support/
Saw your post on the HAMB. Should've warned you about the greeting you might get from some of the members, but see you got some good info. Here's a couple more links for you: https://www.jalopyjournal.com/forum/threads/hemi-tech-daimler-hemis.355232/ You may want to pm LimeySteve in that thread who seems to have some Hillborn/Daimler info. Here's another: https://www.pistonheads.com/gassing/topic.asp?h=17&f=140&t=746020 Cool car. I'm wondering whether those Hillborn systems cast for the Daimler were meant for drag cars rather than road racers?