Will ls7 injectors fit and work on an ls1 w/ any wiring differences?

 

You could make them work but it's a lot of bother.
The LS7 injectors are shorter....probably have a different diameter where the O ring goes, and have a different electrical connector.
Being shorter injectors the LS1 fuel rail will be sitting up too high.

 

is this the same with the ls2 32lb'ers

*sorry for the *

 

Yep



LS2 (top) v LS1