YES!
There should be a thin paper gasket under the bottom of the flange, but if there's a gap at all, the oil pump drive isn't lined up with the drive tang on the bottom of the distributor shaft. Make sure the drive gear is meshed with the camshaft in the proper place to get the firing order right, and tap the starter until the oil pump drive drops into place. Then set the ignition timing, and you're good to go.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!