I did your exact setup to a T. I am running a 72 350. Here is what I would do if I were you.
Look at some of my posts.I did have a gforce at first, then moved to a iceman. I also ran down pipes from TA performance.....that worked very very well. But decided to try the Hooker Headers and they worked too!!
viewtopic.php?f=13&t=31634
viewtopic.php?f=13&t=31634
viewtopic.php?f=13&t=35498&hilit=+hooker+headers
Look at some of my posts.I did have a gforce at first, then moved to a iceman. I also ran down pipes from TA performance.....that worked very very well. But decided to try the Hooker Headers and they worked too!!
viewtopic.php?f=13&t=31634
viewtopic.php?f=13&t=31634
viewtopic.php?f=13&t=35498&hilit=+hooker+headers