manual valve question

I have a stock 904 trans in my '73 Dart. I have had multiple issues with leaks and finally narrowed it down to the shift shaft seal and kick-down seal. To replace these I removed the valve body. When I put everything back together, before putting fluid back in the trans, I ran through the gears to make sure I had everything adjusted correctly. The trans will not go into park. My problem is that the manual valve will not run smoothly through the valve body.

My question is, will this clean up once pressure has been built up in the valve body? I don't want to put it all together, fill it with fluid and still have this problem. Any advice would be appreciated.