Yep, I'm with Strokerscamp on this one. The old "only good for high rpm" story about TRs is a myth. The Weiand that the OP has is a great intake, Better hang on to it. They don't make them for the B motors anymore, just the RBs.
http://www.hotrod.com/techarticles/hrdp_0801_mopar_intake_manifolds/mopar_performance_manifold.html
