Hi Guys, long time no see

Hope everyone is doing well. I have been very busy building my new project.. 69 Olds Cutlass.. Almost ready for paint. I'll post pics when I am done and see if anyone can guess what color I picked... hint it will be a bmw color
Anyway, I got a O2 sensor warning Bank 1 sensor 2. I know it is the one down below and I bought two of them, figured if 1 is going to go, the other is not far behind. My question is, are the hard to get to? I just felt around up there and it feels like they r on top of the pipe. I hope I dont have to drop the exhaust to get at em lol
Any help would be great,
Thanks
~Andrew~