I bought an old MB-3 on Marketplace and made it into an upright cruiser in the Rivendell style with Nitto bars, Suntour Power Thumb shifters, a Brooks B17 saddle and plump 2.35" tires.
Build list
• 1985 Bridgestone MB-3, 23" frame, Cadet Blue
• Sunlite Rigid MTB fork
• FSA Duron 1" headset
• Araya 26" wheelset
• Schwalbe Fat Frank tires, 26 x 2.35
• Nitto x RBW Bosco bar, 56cm
• Nitto Technomic 11cm stem, 25.4 clamp
• Suntour Power Thumb shifters
• Shimano Alivio T4000 brake levers
• Origin8 v-brakes
• Jagwire cable housing, ice gray
• WTB New Paradigm Grease Guard headset
• Sakae SA Crankset 46x36x28
• Shimano 115mm square taper bottom bracket
• Shimano 6 speed freewheel, 14-34
• MKS Grip King Lambda pedals
• Shimano FD-AL11GS front derailer
• Shimano RD-Z503 rear derailer
• Kalloy Uno 26.6 seatpost
• Brooks B17 standard saddle
• Wheels Mfg. brass housing ferrules
• Tanaka bottle cage
Music
• "Polygondwanaland" by King Gizzard & The Wizard Lizard (2017)
https://kinggizzardandthelizardwizard.com/polygondwanaland
Backing audio
• "Ocean Waves Sea Tide Hayburne" by Sonic-ranger (2014)
https://freesound.org/people/Sonic-ranger/sounds/243591/