I am trying to post a new tool I developed. What do you think? They are for adjusting air/fuel misture on 4 barrel and 2 barrel.
                                                    

I invented & built a couple of specialized tools over the years (necessity is indeed the mother), but won't bother to post photos. One was a jig to hold & test overdrive solenoids, since many would appear to be working properly when tripped by a battery when bench tested, but when installed on a trans. would not operate as designed (mounting jig allowed application of spring load).
The other was for forcing down inside door handles until the spring clip engaged the shaft. It fit the flat of the handle base, with a cutaway relief where the curved part is. Needed on some doors if you want the handle tight against the door panel so it doesn't rattle.

6 VOLTS/POS. GRD. NW INDIANA

I would love to see your door handle tool very interested. john

Not rocket science. Just a couple of 8" 2X6's screwed/glued together, with two pieces of scrap 3/4" plywood between them. One long piece of plywood extends diagonally to merely act as a handle. The other (closest to the door panel) roughly follows the angle of the chrome door handle, but only functions as a supporting spacer (before the glue dried, I fitted a chrome handle to assure clearance).
To operate, a shallow/partial hemispherical depression (chizzled out) centered midway, and between the 2X6's is then fitted over the mounted/registered door handle base. I painted a centered cross hair target directly opposite it, which you strike with a humongous rubber mallet to set the spring clip (or failing that, lie on the seat with your back against the passenger door, and push with your foot).

6 VOLTS/POS. GRD. NW INDIANA

I think everyone who works on these older car has made many "tools" to aid making our work easier. I've sure made a lot to aid in fixing my Harley's.
The best thing I've made for my Ford was making an adapter for a UniSyn work on the dual quads I installed. There doesn't seem to be many tops for the Carter WCFB's I used available anymore.

56 Vic, B'Ville 200 MPH Club Member, So Cal.