I'm not sure what info you're looking for, but I did a 500km tour on my 1982 Miyata 1000 last year. Had front and rear panniers. My 1982 lacked fork braze-on and a seat tube bottle mount, so the front rack I used had a adapters and I installed a bottle mount adapter. I used vintage cannondale panniers for the front and back.
The ride itself was very smooth. My bike had 27 1 1/4 inch tires using Schwalbe HS159 tires. The bike had a Suntour ARx FD/RD with downtube shifters, Sugino AT triple crank, 6 speed freewheel and Sansin Gyromaster hubs.
The frame itself used Miyata's own double butted tubing. The ride was superb. The M1000s are well known to ride well loaded or unloaded. It felt really sporty.
In terms of reliability,I did not have any issues. I chose the right components and did not ride aggressively unless I needed to.
I would've liked to use bar end shifters instead of downtube.
Unfortunately the only picture I took before the long haul.