will my LT1 injectors fit in my 88 IROC Z with a 305 tpi?

 

They will fit yes, but will they work with the 305 & stock ECM & Prom..NO. You will run pig rich..

 

stock 93 lt1 injectors are 24lbs, stock 88 305 injectors are 19lbs.

 

If they fit, they most likely work, but there may be some idling issues. The PCM reads the O2 sensor output and adjusts injector pulse for proper mixture, and also adjusts the A/F tables to keep things happy. However, if the injector pulse is too short the PCM won't have problems controlling the injector pulse. The one thing you can't do is to mix different types and size of injectors.