I'm pissed! Need immediate advice on O2 sensors-please help!

[Stang_ROTY]

Never in my life did I think that this project of mine would be so f'n aggrevating and painful to my pocket! Today I brought my car down to the exhaust shop to get the H-pipe modified to fit the 351W swap headers. I get the car back and the H-pipe looks great. Then I get under the car at home and realize that the guy at the shop chopped off my collectors where the boss for the f#@$'n O2 sensors fit and customized it to fit the car but didn't put the holes for the O2 sensors in the pipe! Now I'm really pissed. It seems like every time I take 1 step forward I'm taking 2 steps backwards! Now I have a perfect fitting H-pipe with NO SLOTS for the O2 sensors. I still can't believe it. I started the day with a H-pipe that had O2 sensor bosses that wouldn't fit around the SFI bellhousing and now I have a perfect fitting H-pipe with no boss for O2 sensors. My question is how hard is it to weld the boss from the original pipe to the the custom H-pipe, and if it can't be done can the car run efficiently without the O2 sensors?? I know that O2 sensors are vital to keeping the air/fuel ratio around 14.7:1 but can the car run well without them?? Ho do you guys with the long-tubes run the O2 sensors?? Thanks in advance. this really sucks, man. I've finally gotten to the point where I'm thinking about selling the whole project.

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Finally DONE!!
93 GT, 393 stroker, Dynamic Roller Mite C4, 8 pt cage,
Sothside Machine bars & Sub-frames, 3.73's,
'69 351W block w/SCAT crank.