As I go down the spec sheet in the 1985 catalog, here is what I have identified by inspecting my bike:

Frame size: 21”
Frame Material: Cr-Mo Double Butted Tubes
Front Fork: Cr-Mo Complete Fork
Headset: Origin8 (original was most likely TANGE)
Derailleurs: Suntour
Cluster: SHIMANO 14-34T MFTZ30 Megarange
Chain: KMC Z narrow
Crank Set: Shimano FC-1057 14-38-teeth
Pedals: MKS (look exactly like MKS Sylvan Touring Pedals online)
Tires: Kenda (32-630) 27 x 1 ¼
Rims: Weinmann RM19 36-spoke silver
Brake Set: Shimano BR Z72 with XLC V-Brake lever
Hubs: RL (Redline)
Spokes: (don’t know how to measure)
Saddle: Ariake 7378 (with ‘Miyata’ printed on rear)
Seat Pillar: It just has “22Nm” on the back under the seat
Handle Bar: Riser
Stem: Nitto Technomic
Color: Red (recently re-painted and don’t know what original color was)