Yes, the regular BG headers are good for a blow through. If you havent allready I would suggest going to Turbomustangs.com. You can purchase everything you need from that site/sponsors. Go into the "builds" section and find a thread that says "BG/ponydown/quicktime hotside with DIY coldside" There are plenty of photos and info to refer to when needed. I think you can get a complete bolt on kit from BG for about 3k now. If you dont have a welder allready, thats tough to beat.
Best of luck, and just be patient if you decide to get the welder and fab the pipes yourself as it will be the most time consuming part of the build but also the most rewarding.
73 CJ5 408W, 4sp Toploader, 9" locked up front and rear
03' MG Cobra, 2.9 whipple, T56 Magnum, Mcleod RXT, 591/540