The Bees make the short trip across to Stamford Bridge for their fourth-round replay, three weeks on from impressively holding the European champions to a 2-2 draw.
Only Fernando Torres' goal seven minutes from time prevented an embarrassing Chelsea exit at Griffin Park, where interim manager Rafael Benitez came under fire from his own supporters.
"Chelsea Football Club at the moment does seem a very strange place," Moore told Press Association Sport.
"Stood in the goal at Griffin Park the other week you could hear them at half-time screaming at their manager, saying they want him out. It must be an uncertain time but for us, to be honest, it is probably the best possible time to play them.
"Sunday is going to be a great opportunity for all of us and one that we're very excited about. We're going to go into it full of confidence, with every belief we can get through.
"After the first game, we sat in the changing room and were genuinely disappointed. We really felt we could have won the game.
"We've got another chance on Sunday to show what we can do again. We're going to go full of belief and we really feel we have a great chance to go through to the next round."
Moore would be more than happy to face a penalty shootout despite Chelsea's Champions League heroics last year.
"I would take penalties now," he said. "I would feel very confident if it went to a penalty shootout. They have got a fantastic goalkeeper there in Petr Cech, who is very dominant figure and that night in Munich was special for him and for Chelsea Football Club. Hopefully, though, it won't be a special Sunday for them."
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- Chelsea Football Club
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