F.I.C. Fuel Injectors for a 1990 ZR1

[Beaver's 90ZR1]

I just replaced my fuel injectors with F.I.C. Injectors. I don't believe the new injectors are as close to the injector housing as the old injectors were. There is definitely a bigger space. Everything is installed properly, checked, and re-checked. Is this normal for these injectors? Please see the attached pictures which show the same four injectors - old injectors before removal and the new injectors after installation. I just chose these particular four to show you to compare. All other injectors look the same. Thank you for your help.