Please tell me the best fit small block headers.

I am considering installing headers to my 390 stroker.
I have always been the stock look etc kind of guy but,
have really given it some thought and if I can find a clean fitting set of headers I will make the move.
Also if anyone has replaced stock 340 manifolds with headers and can honestly say it had a real impact on performance I really would like to know.
I have just a nice fairly basic stroker build with bolt on Eddie heads.
When the machine shop did the Dyno it came out with 450H.P and 490 FT/lb torke.
I'm just after a liitte advice here..
Thank you in advance!:D