I put a new o ring on the distributor of my 440 and am having a terrible time gettin the thing to seat. I confirmed everything is lined up correctly, without the o ring the dist. slides all the way down and seats like it should. I tried setting it dry, oiled, even tried chillin it in the freezer to get it to contract some...wont work, it just tries to squish and not slide down. Tried pulling it down with the clamp, but was concerned about going too far and breaking the flange on the dist. Any ideas??