Tapping Mafia intake for injectors

Getting ready to install a mechanical injection setup and had a question on injector orientation on the TFS "Mafia" intake. Are you guys just installing them straight up on the cast bosses? Instructions want them 90 degrees to the runner and 1" to 1.5" back from the flange.

I put injection on A head 598 with a TFS intake.  The bungs are set up for EFI of other injectors that spray out of the bottom.  My Ron's deal sprays out the side of the nozzle.  I carefully ground each boss off and finished it with a sanding roll.  A mill would make short work of it.  It still didn't put the nozzle in at 90° though.  That would have but the nozzle spray right in to the roof of the head port.  I angled it down to spray towards the head of the valve.  Did the first one by eyeball and then made a little wooden drill bit guide to make the others match.  You can see my nozzles are not in at 90° to the runner in this pic.

Thanks David, I got much the same answer from Scott at Kilker Rons.