GP Sorensen was the name.

 

Certainly an old established name in the aftermarket. Sadly, the name - even AC Delco - does not equate to quality for all parts, and Sorenson is best known for ignition/electrical parts.
If they did, all parts recommendations for EFI systems would be 'Bosch'

Note, I'm NOT saying their products are deficient, either. Just that you dont know which mfr they get them from or what their quality specs are.

 

Several of the aftermarket injector upgrade kits don't include the new bracket. AC Delco and Delphi both include it with the injector assembly. The early kits also included the plenum gasket as well, not sure if it still does.