The piece at the firewall i may have, have to search. The air box i don't have but will source one for you. And yes they came off a very strong running car.
Just yesterday i bought an engine with 240 Z carbs from a 1972. All the linkage is there from firewall rod to carbs. I would let these carbs go to someone who can appreciate them for $150 and comes with linkage.
I have a rebuilt 5/spd from a 1983 Zx fresh never been installed. All bearings, gears, seals and new trust washers.It's virtually new asking $850. I may have a lead on another 5/spd which is going for $450. I will check on it if interested.
Cannon manifold for what application ? I have two pairs of Cannon manifolds for Weber DGV carbs. I f that's what you're after let me know exactly what your application is.
Someone posted up a T-5 transmission for sale here in my city, selling it for $500.00. If you're interested in this i can do the foot work to check it out then send pics to your e/mail address. What i have is a low mile 5/spd from a 1987 Z-31 which i believe you can swap the bell housing to make it fit your L-series. Let me know.