I recently did a story on carb tuning for a tunnel ram on the street using a Weiand flat-floor tunnel ram and a pair of 600-cfm 0-1850 carburetors. This particular package worked much better on the street than I anticipated, and it got me to thinking about other multiple-carb systems you could run on the street. One of the more exotic OE systems was the ’67 to ’69 Z/28 cross-ram manifolds and carb setups Chevy offered as a dealer-installed option or as over-the-counter parts to support the early days of Trans-Am racing. While the NOS parts for these systems are ridiculously expensive and the repros are not much less, I still like the idea of this induction system for a Pro Touring car. Offenhauser still makes a close reproduction of the original Chevy tunnel ram under PN 5893 for the base and 5903 for the 2x4 lid. Together, these two parts will run around $535.00 from Summit Racing and you'll still need the $130.00 2x4 linkage kit. But this is cool stuff. This would probably take some carburetor tuning to get the engine to run correctly, but it surely has the look that would set you apart on the street. The up-sell would be to convert this manifold to multipoint fuel injection using a pair of throttle bodies. You could even convert carburetors into throttle bodies, which would be less expensive than those billet EFI four-barrel throttle bodies. Then to complete this whole retro Trans-Am look, build your own cowl induction air cleaner that picks up cold air off the firewall.