hello everybody hope everyone is good ,i am having a small problem would like opinions on i have 69 mercury cougar 351w block and the top starter motor bolt keeps working itself out and causing problems with starting tried to put a lock washer on it and it made it worse so i took the washer of. i was thinking about replacing that bolt any suggestions on this i noticed that the top bolt seems shorter than the bottom i was thinking they were supposed to be the same length? i noticed the bottom bolt is longer with a rubber spacer on the bolt itself to help with the seating process. i went to autozone to look for unversal starter motor bolts i only found gm bolts. does anyone have any suggestions where to go and find some new ones anyone had this problem and how did they fix. thanks in advance