After weeks of modifying the zbar to fit around my headers I finally have it all sorted out! After cutting and welding and grinding and relocating the prongs on the zbar, I put a stock on on and it fit.
There is still some tweaking to be done but all I really had to do was shorten the rod from the clutch pedal to the bar, and shorten the rod from the bar to the clutch. The pedal feel is very soft still and I want to tweak it back to feeling firm like it was, but I'm not exactly sure how to do this. Trial and error has been the method thus far, so I guess I'll continue until it doesn't work. By the way I have foot long flanges off the collectors and cherry bombs followed up by some turndowns so it sounds nice like a 283 should!