It would be neat to take the shortened pedal, and drill a hole through it a good distace from where you've cut it off, and run a bolt and sleeve through it, and then cut a slot where the linkage could just work through, it when it moves, and then the tie rod end there wouldn't be obvious. You could put a little plug end at the cut end of the pedal. Other options, would be an alloy pedal, might get a deal on a broken one, like something off a VFR or CB1100F euro-spec model, etc. You could then cut it down and polish and shape it nicely without the hollow in the middle of it. Just a suggestion. Motocicli Veloci Milano has a Bimota replica pivot that's not exactly cheap. You might wanna take a look, it would give you an idea what you could work out of an alloy pedal. Me, I was thinking the same thing as you, with the chromed steel pedal too. I actually telescoped a new end, from a C70, into the cut down DOHC CB750F pedal. Gotta braze it up. You could do something similar too, you could cut threads into the end of the cut down chrome pedal, big fat thread, and then bolt in a nice clevis end or better still a ball end. Dunno where you'd find a small ball end on a large bolt, but it's still a thought. Maybe a bolt stuck in there, then drill it and tap threads in IT. Better than messing with braze and stuff. Best if it's stainless too. I also agree, you'll want them to be parallel, or at least the same length.
What I'D like best, would be a rear-set that's got a round shaft rather than a plate with a triangular hole cut in it. Just a pedal with a threaded hole, a thread ended rod, and a toe end with a threaded hole in that too. Maybe a set screw to keep them from bending around that axis. It needn't be any kind of fancy material, a screw-driver could be a good source for a hardened rod, it's just that it would be hard to cold work the thread cutting. Better to go with alloy, or unhardened steel that you could heat and quench if you like. That would give the stiffest rod for the diameter.
-S.