Just finished installing new motor with new gas line filter, mechanical pump, and hard line to new Edelbrock carb. Cranked motor for long time and still not getting fuel to carb. The fuel filter mounted before the pump shows fuel only filling half of the clear portion. Is there too much air in line? If so, how can I purge the air out? I have added about 8 gallons of gas, so yes it does have fuel. While cranking you can see fuel "swashing" (?) in the filter as if there is some type of pressure increase/decrease,.....any ideas?? Thanks.