Panhead you can see the plunger go down if you look at the top of the lifter. Remember that it only takes about 60th's to get the lifter to tight. When you first start the car the lifters will fill up in about 1-2 min's. or so. But just priming the engine will take it a lot longer ,, depending on how strong the drill your using. If it were me I would take the intake & valley back off & look to make sure you don't have them to tight. If you adjusted them when they were low , or not filled up when they do fill you may have them way to far adjusted up & now the valves are just all hanging open. Also you should leave the break-in oil in for no more then 500 miles. But you are proberly safe to about 1000 miles.You don't have to remove the lifter & soak them now because you have pumped some, most of the oil needed into the lifters now so just leave them in. But back off the rocker nuts & let them sit for about an hour before you go back to it to adjust them. That will give the lifters a little time to relax & let the plunger come up to it's normal position. I would though reprime the engine to make sure all the lifters are pumped up. I had 1 engine that took about 20 min's to completely pump up. But that was an odd ball & most will pump up in about 4-5 min's . But if you R&R the dizzy & reprime it you will know that theres oil up top & all the lifters are full. Depending on the gaskets you may be able to reuse them. The intake you should be able to Y the valley pan gasket if your real careful you might be able to if you use some silicone sealer along with the old gasket.
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