I would not use the old 461 style heads,double hump,if you can budget for some better heads.I used the old iron eagle 215 heads with a team g manifold on my 355 in my 68 camaro with great success.I now use a set of the iron eagle platinums on my 383 and they are worth about a tenth over my old iron eagles.
I am willing to sell the iron eagles and manifold if you are interested.
http://stevecoxracing.com