what would be the recommended size and brand?

 

also i would like to know what i should be looking for when i build this stroker, what information do i need to be looking for for optimum horse power

 

depends on what you have to spend??

 

way too many variables. what powerband do you want, launching RPM for strip use, etc etc..

we can spew off names of good heads all day but it doesn't make a lick of difference until you figure out what you want.

 

As far as good ones for a 347 there's a few trickflows(high port and I hear fast as cast are good), I like my Canfield 195's. Also afr205's work good on 347's. But do a lot of research and figure out the best head/cam/Intake set up that works for what you want.

 

As ctgreddy mentioned, High Ports and the TF FAC (fast as cast) heads perform very well. Since it sounds like you are a "new user", the FAC's might be a little bit easier for you to use.
High Ports have a raised exhaust, im not sure about the FAC's, but it can cause header clearance issues in some cases.