The snap-on tool referenced above is $35 and I know that times are lean but it was a well spent $35. Plug R/R was 5 minutes, no bleeding, and no profanity. Just have a 3/8" socket u-joint ready along with your extension and ratchet and go in through the wheel well. The longest part of the job is spinning the old plug out with your fingertips after you break the plug loose with the tool.
Good luck.