Would the swap be plug and play?

The car is a 99 GSR and motor will eventually need to come out. Would like to have minimal downtime if possible. Would the harness and ECU be able to plug into the LS motor with no modifications?

 

yes you will use i believe 3 less plugs. why would you want to do that swap anyway?

 

Its a temporary thing to keep the car running. Just exploring my options just in case I need to rebuild my block.