In my '36 120b I use the LEDs I purchased from highspeedmotors.com for rear stop and tail lights. My turn signals use the rear LED stop lights and front incandescent fog lights.

The use of incandescent lights in the turn signal circuit eliminates the need for an electronic flasher unit that may be required for the LEDs to flash at the correct rate.

The LEDs are much brighter than the halogen incandescent bulbs I was using.

Perhaps a head gasket leak? Coolant on the spark plug when started, but as soon as it heats up, the coolant evaporates.
What do the spark plugs look like?

I have Diamondback radials on my '36 120b touring sedan. Ordered them from the Whitewall Candy Store in Orange, CA., who also did the mount and balance. No problems using the original rims.http://www.whitewallcandystore.com

Made a big difference in the handling and driving pleasure of the car. I highly recommend them. It did take five weeks to have them delivered because they are custom made from modern radials, in my case Falken radial SUV tires. You can read more about the process athttp://DBTires.com.

On my '36 120b touring sedan, I just pull the lens straight down to remove it. Same as the '37.

The clutch pedal free play was 1 1/2 inches. I adjusted it to 3/4 inch. Still grinds a bit when putting it in 1st from a stop. Not as much, though... The clutch is fine otherwise, no signs of slipping or grinding in other gears.

Thanks. I'll look into it.

I've noticed with my '36 120b sometimes the transmission gears will still be rotating after stopping. The gears will grind slightly putting it in first. Seems the engine spins the transmission with the clutch disengaged. Is this a normal situation?

Just a side note. My '36 120b runs about 175f at 50-55mph. 180f in normal street traffic I usually keep it under 60mph on the freeway. Of course here in Southern California you are lucky if you can go 55mph with all the traffic..

Removing the thermostat could make the car run hotter. Without the restricted flow of the thermostat, the coolant will flow too quickly through the radiator and not have a chance to cool.

I'm also an owner of a 1936 120b, so if you have any specific questions, feel free to ask! Congrats on your new car.