The 22-year-old was in the Queen of the South side which won the trophy in a penalty shoot-out against Partick Thistle last season, scoring in the game which ended 1-1 after 120 minutes.
That goal against the Jags was one of 41 which earned him a move to Ibrox but he has been in and out the team this season, albeit at times due to injury.
Although he started against Arbroath in the 2-1 win at Gayfield at the weekend, Clark, with eight goals this season, will have to wait and see if he will get the nod from Ally McCoist for the trip to Leith.
However, he insists he will be ready whenever he gets the call as he looks for his second winners' medal.
"It is obviously great to be in the final this year and hopefully it is the same again and I get to win it," Clark said.
"It would be amazing to score the winner but as long as somebody scores the (winning) goal, I will be happy.
"Obviously everybody wants to start, especially in cup finals, so it would be good to start the game, but if that is not the case I would be happy to come on and you never know, I might get a goal.
"I came on against Brechin a couple of weeks ago and scored so I would be happy to come on and do that again.
"It will be a massive day for the club. The first cup final in a couple of years so it would be great if we could win it."
Clark will put aside all thoughts of the William Hill Scottish Cup semi-final against Dundee United at Ibrox the following week to concentrate on the task in hand against Rovers.
However, he admits going into the United match with one cup already secured would be a boost for the Scottish League One champions.
"Obviously it will be important to win it for confidence," Clark said. "It would be good to take that into the Dundee United game but we are just looking at the Raith Rovers game first and foremost.
"We really want to win that game so we can't really think about Dundee United too much before this match is over.
"We had a good result at Arbroath last week. I don't think people understand how difficult it is to go to those places and get results, but we did it again and we will take momentum from that game into the cup final."