Thermostat Housing

I'm looking for a thermostat housing that is 90 degrees and swivels for my 340. What will work? Edelbrock makes one (#4814) that is supposedly for small block Chrysler and Chevy according to Summit Racing. If my memory serves me right, Chrysler recessed their stats into the housing and GM recessed theirs into the intake. I don't understand how it can work for both. Also, I'm not looking to spend a $100 just for a housing either. Any suggestions?