Layden B

Isn't this a Master Vibrator? I think you need to find a one cylinder coil box.

3 holes on top for the mounting bracket makes them 1915+. Hard to find such nice original fenders these days.

Many chassis were sold for local completion especially overseas and commercial uses.

Look like Motor Wheel type N to me.

20 T Speedster, It is amazing the different things made to fit a Ford! This is silent chain driven, roller chain was used at times and rarely seen is the shaft drive with small gearbox on the timing cover and magneto. All 3 used the same magneto mounting bracket you have.

Maybe it is not a Buick at all but an Oldsmobile Series 20?

May have been made by the engine manufacturer hence no markings.

Note that on the 1914, the rear render is flat on top. The body bead for the fender follows the fender and is also horizontal at its highest point. A 1915 fender curves further around the wheel, thus the body bead curves slightly down where it ends at the rear. Agonizing details! Hard to see from the picture angles but this tub is probably 1915+.

Does it have a bead at the bottom of the rear panel? How about a side and a bottom picture? Sure does look 1914 era Model T Ford.

Steve, If it is the valve plugs that are getting blown out of the head casting, perhaps the threads are not coarse enough for them to hold into the head. With different coefficients of expansion and different temperatures of the 2 parts, maybe the threads loose their mating faces. This picture is of 2 different valve plugs, unknown on the left with 12 threads per inch and Wisconsin T head on the right with 16 threads per inch.

Chevrolet Series C Classic Six from 1912-1914 is a 6 cylinder. It had a T head engine. Series I Light Six was offered 1914-1915. It was an L head engine.

I believe that they did not rotate at all! Just acted as a cushion between the rim and the center of the wheel. It is our expectation of them to roll around that sends us down the mental path to a dead end.

They absorb the shock of having hard rubber tires.

Maybe these irons would help! https://www.mtfca.com/phpBB3/viewtopic.php?f=5&t=38657

Model T Ford reproductions! After all, Henry bought the bodies in the early years and they got the irons from suppliers! https://www.modeltford.com/model-t-parts/top/body-to-top-brackets/ see also the second page.

4 lug wheels Essex

The flats on the 6 drive pins lead me to think this is a Hayes brand wire wheel hub. The Ford logo in block letters faceplate dates from about 1906, thus is not original to the hub and cap assembly. Hayes started into wire wheels in the later teens era. Picture of the back side of the hub would help identify what car this was made for. Dimensions would help as well.

It seems nobody likes the original air intake horn on the Winfield N carbs!

James Cork started making Model T engines in 1920, am sure it was a slip saying Model A.

Overland is my guess.

Metalbender Am pretty confident that the Kingston 10 ball is not double beautiful, just complex.

Maybe someone can put a name on this big 2+" variable venturi carb. I have always assumed it to be experimental aircraft as the venturi ( made of 2 counter rotating cylinders) seems to be operated by the difference in pressure across the throttle butterfly.

New Miller carburetor

Zenith O4D as has been said came on V-8 Chevrolet but racers put them on DOHC Frontenac heads on Model T Ford blocks.