Back in Black You have the 950 kit witch is a nice basic kit. The max power with 36 lbs is about 480 -500 hp at 5500 rpm If you turn up the fuel pressure you may get another 20 hp. Rick Long back in 93 was running the same system as you but the computor was only 286 kb speed now they are 10 times faster That was rpm does your motor nose over?? I have a 452 FE with 50 lb injector and goes strong right to 6000 rpm when it hits the chiup in the MSD. When I up the super charger I am going to 72 lbs or 92 lb injectors. Rick had the 4 85 lbs injectors no his system and the car nosed over at 6700 rpm, out of flow for the injectors He put a dual system on the car with 8 65 lbs injectors and the motor pulled hard to 7500 rpm his red line. The only problem was the flooding of the motor when the dual throttle bodys are WOT. The cylinder where getting washed down and fuel was getting in the
oil. They cut back the fuel pressure to min and it help with the wash and black smoke problems. He was one of the first to run the holley systems but had many calls to tech to fix the conditions. The 900 system you have has either 4 75lbs injectors for for 500 hp or 85 lbs good for 575 hp. If you are using the commander 950 mpi system, you have 1000 cfm or 2000 cfm throttle body and only 36 lbs injector. I would worry about a lean out on the upper end with small injectors. Better too have too much than being too small. My bother melted a 5.0 with too small injector with a blower 9 psi. Injectors run best at 80% of duty cycle. 100% with high pressure causes fuel flow trouble and pulsing fuel from the injectors at 100 % duty. Hope you understand my answers. I learned from the school of YEAH I KNOW IT ALL!!!!
Got to go Rick Lake