If your doing a 535 cid engine the only reason to use either stealth head is if you are going for a stock engine appearance?
I don't know what the engine is intended for, or what cam and valve springs or compression you plan to run?
The different heads have different chamber sizes which will change the compression ratio. The Stealth heads ate 80cc, Edelbrock RPM 84cc, Victor 75cc, etc.
If you plan to use a big cam, you may want a head that uses a longer valve and installed valve spring height?