Distributor Gasket

So I took the distributor out earlier to make tightening the rear intake manifold bolts easier. Got the new seal for the distributor out and the dang O-ring provided wants to fall straight down into the engine. Anyone else experience this with the Felpro 6464? Am I wrong that you are just supposed to carefully supposed to try and set the o-ring on the slightest of chamfers around the distributor hole and hope it stays? (First attempt to get the distributor in it did not seat into the oil pump gear properly. When I pulled it out the o-ring had fallen in.)