At the time I didn't know about adapters to join the upgraded injectors to the 1992 OEM fuel rail and lower manifold so I used the 300 Degree fuel rails. In your case I recommend to use the adapters and OEM fuel rail to save $$. Mine have been in since 2009 with no issues and I never did redo the 12v at the injectors when key off. The car runs better than when the original injectors were running with no issues. Car sees only about 500 mi/year so I use Stable in the fuel.