Since You are having issues with Fuel Mixture Needles, is the Float buoyant. and adjusted correctly?
You say sometimes the Shift lever won't move, is the Motor running when this happens?
The Mixture Needle are not use to adjust or set Idle Speed. Spark Timing is what determines the Idle Speed...
The Al was 14 1/2 and the SS was 15 1/4
Don't know if the AL was cupped, or, actually anything about it.
If the AL was already at or below the low end of the Rpm Range, then more Pitch will really drag it down, more than the usual 200rpm/in
On a Q-jet, the Secondary Throttle Shaft/Plates are moved/opened by the Throttle Linkage. An Air Valve above it is what allows Airflow.
When the Choke is not fully opened, the Secondary Shaft is Locked and will not rotate, and a Spring on the Secondary Shaft, allows the Throttle Linkage to...
Airflow Sensor? The Air Valve over the Secondaries, is opened by the Pressure Differential that is between above and below it. It is dampened by Spring Tension.
My first 3 cars had the Floor Stomp Dimmer Switch; 66 Ford Galaxie, 71 Buick Skylark, and 76 Olds 88 Royale.
I remember the Foot activated Starter Pedal, on several Trucks on my Grandmothers' Farm.
I also remember the Turn Signal Switches, being in a Housing that was Clamped to the Steering...
If is far easier to stay warm, than it is to cool off. 10C(50F) is plenty warm enough for Shorts and Short Sleeves. 20C(68F) is getting hot, and 30C(86F), is too Hot. I have had the AC going full tilt boogie since the Snow Melted in Late April/Early May.
The Air is a Lot more Humid as the Polar Caps melt, and Weather will be getting More Extreme
That's 40C, and we had a few days like that 2 yrs ago, up here the Great White North. Brutal, then at Night, 100% Humidity.
I built an Ultrasonic Cleaner in the 70s, Heathkit
Various Automatic Chokes Systems were devised on some Engines by OMC during the 60s, by the mid 70s, they were discarded and the Solenoid Electric Choke, as used by others, became the Standard Electric Choke
