I changed the conical mount bushings, #71032, on my 0-320 PA-12 last Saturday. The post on this site references that the measurement from inside of the washer to inside of the washer should be 1.84".
Mine was 1.75". Is this critical? The AN 8-44 bolt was only showing one thread beyond the castle nut. I couldn't loosen it anymore if I wanted to.
Technically I believe the picture shows the bushing for the 0-290 engine. It is different from the 71032. Also the above referenced post shows the bolt head aft and the castle nut fwd. My bolts were originally installed just the opposite with the bolt facing aft. I see some pix on this site with the bolt going fwd. Does this matter?