o.k. thanks. Yeah, Ford had it '85 to '87. Dodge till '85. Ford was slow on the draw . There was a switch to the rectangular pre-combustion cups that took place somewhere along the way which I believe corresponds to the switch to 0 degree spec nozzle spray pattern. Hoping to confirm.

There might be some interchangeability issues with injector height differences as you see above and hard lines. And the question of nozzle spec. tho I can confirm the 15 degree injectors do fire a rectangular pre cup head nicely. Idis are so forgiving.

My '90 mitsubishi 4d56 called for 0 degree injectors. Hope to confirm the shape of the cup shortly.