You have to have the front o2, back one you don't, but front tells the computer what to do. I don't think it's needed to start, but is needed to run correct. Can you splice the wires to make it run long enough to heat the pipe, if not heat the bung with a torch trying to not heat the sensor. Hook 2 wrenches together for more leverage, it should come.
94 jz, bruiser, la, cage,5.3 ls, 36 swampers 98 jz, the mutt, 3.5 iro, 33 swampers, avalanche conversion, 02 north face avalanche blacked out work truck, 06 rhino R1 engine, 4x4, Leeroy's custom paint, 04 escalade wifes truck 22s, 03 duramax 18s, completely blacked out, efilive by nick, wicked wicked truck, 39 chop chevy rod, aluminum 5.3 ls, 08 apex, 310hp mcx turbo, holz 162, completely black, CCM built.