If you can swing it, I highly recommend DSE's "600-series" steering box. I installed one on my car this year after my long-abused fast ratio box out of an 87 IROC died; the DSE box has *excellent* weight and feel through the steering wheel. It's also a bit lighter.
Troy
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1969 Chevelle
Old setup: Procharged/intercooled/EFI 353 SBC, TKO, ATS/SPC/Global West suspension, C6 brakes & hydroboost.
In progress: LS2, 3.0 Whipple, T56 Magnum, torque arm & watts link, Wilwood Aero6/4 brakes, Mk60 ABS, Vaporworx, floater 9" rear, etc.
Dan, here's the Link to Marquez Design and Fabrication. They're a site sponsor and carry the full line of Detroit Speed products, plus they're a great bunch of guys to deal with.