Converting single to RAC db is a matter of configuration. It is not a big thing, but after configuring the db as RAC, you need to clear the Apps conf stored in db and run autoconfig on both of the RAC nodes to build it again...
I m talking about fnd_conc_clone.setup_clean here.
As for the apps node, you can use the same binaries in target.
You can mimic a clone operation
Ofcourse, this is true if ofcourse your the OS and platforms that you will use in your target apps nodes are the same as the Source .
If the OS and platform of your target is not the same as the source one , then you may need to install the EBS Techstack on target..
Here is a list of documents for you:
Using Oracle 11g Release 2 Real Application Clusters and Automatic storage management with Oracle E-Business Suite Release 12.2 (Doc ID 1453213.1)
Configuring and Managing Oracle E-Business Suite Release 12.2.x Forms and Concurrent Processing for Oracle RAC (Doc ID 2029173.1)