Optimus Maximus

the leak is on the far right hand side and it's leaking good , now I know that if I want to do it myself it's going to ba a pain in the *** but i don't want to fork over a bunch of cash to have someone else do it. is this a very hard thing to fix or am i just deluding myself please help me with any info on how to go about doing this.

thanks everyone
Nick