In one respect, a more modern cable linkage might be configured along the same lines as the prior "rod" linkage. The exhaust manifolds were unique, but also had a carb heat provision for each side. Some headers with a "built' hot air stove (ala later '60s) could be fabbed, possibly. Seems like the balance tube had some rubber hose sections? Use some modern aluminum heads without heat crossover passages, too?
The longer divider sections in the runner pairs was what "tuned" the intake to the lower-midrange rpm levels, where resonating columns of air resulted in a mild "super charging" affect for greater cylinder filling. Shortening those dividers moved the resonance rpm higher, more like 4000rpm or so. But the longer length had it's own restricting dynamics for ultimate air flow, it was noted. Hence the factory-backed drag racers used the normal 2x4bbl intakes or the later NASCAR-style cross-rams (with NASCAR using the 1x4bbl version only). ALL with better 6000rpm+ horsepower.
The "chintziest" cross-ram set-up ever was on the '82 Camaro Z/28s. Two 1bbl TBI units, one on each side, with what appeared to be a "performance intake" under them. Only thing was that the runners in the intake manifold had the bottom 1/3rd removed, so much shorter than the normal intake runner AND the intake port in the cyl head. One BIG ledge for that a/f mixture to fall off of when it got to the cyl head! Similar set-up used on the '82 Corvette 350s, both later replaced with the superior "Tuned Port FI" units. Many replaced those earlier dual-TBI set-ups with an aftermarket Edelbrock or Holley 4bbl intake and 600cfm carb for BETTER performance. AND no water intrusion issues via the factory hood scoop! Racy looks did not equate into "racy" performance.
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