74 Duster won't start

I bypassed the NSS to proove it out. The no start didnt happen all the time. This car is my daily driver how else do you start the car if its acting like the NSS is bad? As it turns out when I went to the parts store to buy the NSS when I came out I got another no start, so if the NSS was bypassed its not the NSS. I replaced the starter relay and its been more than a week and haven't had an issue since. I also checked small plastic bushings in shifter linkage and they seemed fine. The whole thing still puzzles me tho. Why sometimes I would have to find a sweet spot in the shifter to get it to start. when it was the starter relay that was bad?

I'm sorry if I posted this in the wrong place I thought it might help others if they were reading...Just like it helped me.