Low comp on one. Yl

[Don]

After rebuilding a 21 stud,doing a valve job !new rings and everything else,,put on engine stand,bad miss!rechecked everything!dist ,wires took off intake ,recheck valve clearance,everything good but no comp on no 7,,
About 100# on everything else,,put some oil in no 7 and got about 70 # ,spin the engine a couple times ,no comp,,,will it get any better or do I take it apart and see what the trouble is!!!
I’m sure the rings are there because I didn’t have any left over.i used nos rings that had the spring in behind the ring,..030 over