car bucks

hey i just installed a bbk o/r h pipe and i have 2 small leaks i tried to fix but i was unable too. now my car surges the rpm's dont move but i can feel the car buck when i put it in drive with my foot on the brake. it even feels like its cutting out under throttle. the cars o2 sensors are broken off porior to me working on them. i recently deleted the smog pump, but in ran fine until i switch to the o/r h. would 2 small leaks cause this problem, when i had my stock h on it had a hell of a leak at the collector and never did this. thanks
ps if this post seems a little off its because ive been up since 7am working on the car and just ended at 8pm..lol. still not fixed

yeah..lol.. i dont have the cash to fix them right now..the porclen ( spelling ) part is what is broken the other part is installed on the bbk right now to prevent a leak at the holes. what would running without o2 sensors do to the car?..to be honest the car ran great prior to the bbk install. i ran a 14.5 1/4 on stock motor with aod trans shift kit and 4:10 gears..lol

i did notice tonight that at the flange near the muffle. it seems a bit too short like by half and inch. so i dont think its sealing enough it sound like im running with no muffler on that side. would that cause a situation with the cars performance...maybe not enoguh back pressure?..anyways im throwing up on the lift at work tomorrow and removing every bit of pipe and reinstalling from the header back to make sure all is well. and using ultra copper sealant on anything that connects together..lol