When I was a a teen my bud had a big block chevelle.
He decided to put a huge intake with double carbs and electric fuel pump.
Well he got the dist. 180 out of time. (well we think thats was the problem the car burned to the ground)
He got the wise idea to pour a bunch of gas down the carbs it backfired and with electric pump and two 850 double pumpers with all four bowls full it ignited, and burned the car. The electric pump was at the tank so it kept pouring fuel to the fire.
After that I learned my lesson. With an old car unless you really know your motor inside and out, a timing chain could have jumped time. ect...
It's always better to be safe than sorry.
By the way only if it decides to run, will it suck the fire in the chambers. Its a little thing called vacum.
If you fill the bowl on the carb, your carb will do its job.
The orginal problem was not getting fuel to the carb
I filled the bowl it ran a couple minutes until the bowl emptied. It still did not pull fuel through the line. I had to prime the pump by sucking fuel through it.
Yes, I need to replace the line, rebuild the pump, and maybe rebuild the carb.
But right now I have running enough to move it around the shop until I get the new roof installed, and do the body work.
I am an A.S.E. certified mechanic, and this ain't my first rodeo.