Another distributor question

[36coupe]

I advanced the timing and it seems to run much better but starts harder when hot.

[supereal]

The last vehicle brought to our shop with a restricted highway speed problem turned out to be caused by the internal collapse of the flex hose between the fuel line and the carb. It can also be caused by the wrong fuel tank cap which restricts ventilation of the tank to allow fuel flow.

[RobR'35]

I too have had the restricted highiway speed problem.
It took me a while to figure the problem.
It ended up being a gas line hose between the fuel pump and the carb.
It said gas line on the hose and when I looked closer it also said made in China.
The grose jet type needle and seat was restricted with small pieces of rubber. Hose or corn gas......? Perhaps both being the cause.
After cleaning the grose jet and putting an orginal type metal fuel line back on its been running as it should.
Also, I have the later type fuel pump with the glass bowl. In the bowl I have a fuel filter with a spring.

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I had the same problem on my 36 and found that the generator and cutout was putting out an over voltage at normal driving rpm's. The coil couldn't take it. Got the voltage back to 6.2 output and everything is fine.