I took a 89 Omni that was fuel injected and put in a older motor that has the 4 bolt crank instead up the 5 bolt in the 89 and I put a B&m supercharger on the the older motor with a 4412 2 barrel Holley carb with 7.5 power value and 70 size jets. I left the factory wiring in the car taped back the plugs and wires I didn’t need. My peck timing was 36degrees at 3800 rpm but playing it safe I set the timing to 25degrees at 3800rpm. When I’m in Fifth gear and I lay into it after about 3 seconds it starts to miss and sputtering I got my fuel pressure regulator set to 6 psi. Any input will be a great help and thank you.