When I can, I hit the Flea Markets up for vintage auto magazines.

All range from '73 to '78.

Current mags in my collection that contain articles on the Mustang II:

Motor Trend Dec. '73    30-Day Road Test: Does the Mustang II live up to its name?

Motor Trend Aug. '74    First Driving Impression: New Mustang II 302 V-8

Motor Trend Feb. '77   Tests: T-Top Mustang

Road & Track Sept. '74 New Mustang II V-8

Super Stock & Drag Illustrated Sept.  '73    '74 Mustang II: Revolution in Performance Cars!

New Car Buyers Guide '78    King Cobra pic. & a blurb

Drag Racing USA June '75 Swoopiest New Mustang II

    Car & Driver Sept. '73 First Test: Mustang II Mach I 

These are the scans in which  I was able to keep file size down & quality up.