No first start?

[Fostang]

Haven't done the pinching of both lines because while driving it earlier and down shifting and at the same time accelerating. A very loud back fire came out through the exhaust. It had only back fired mildly once before. What I tried doing was putting in another distriburator I had laying around. It seemed to help the wobily idle and I tried doing the same type of down shift and this time no back fire but the tires broke traction. Hopefully it was a bad TFI or pick up. I'm to the point of really not knowing if changing from carb/C-4 was worth it to EFI/t-5. It seems to lack the same umph it had with a performer intake and 600 cfm carb. In between shifts is where I notice most of the power lost. Seems to take it a while to rev up. Maybe some of the fault is with using the restrictive stock intake and 58 mm TB. Some people tell me it's because fuel injected motors take longer to respond than carb cars.