Changed Fuel Filter-Now won't start

[Oliver the 28 A]

1928 Model A. Car was running great however I noticed the filter in the globe was pretty dark along with some sediment at the bottom. I ordered a new filter, cleaned out the globe, replaced filter/spring/rubber seal and now the car won't start. It fired right up and I drove it for about 3 miles. Everything ran fine. I let it sit for about an hour with fuel line still opened, fired right up and ran for about 30 seconds and died. Will not start now. I pulled fuel line to make sure I had flow which I did. Could it be something in the carb? Could the fuel line have some kind of vacuum effect and it needs primed? Please help