Yes it will run without proper tuning, just dont expect it to run well.
Best way I have found for a fast start after injector swap is to fill the reservoir, and the heads from the front ports. This means you will need to remove the ICP sensor and the plug from the pass side head and fill them with oil. Reinstall the plug and ICP sensor, and with all the glow plugs out and the covers back on, crank the engine over a few times to clear the cylinders. Put her all back together and let her rip.
Should fire almost instantly.
