From my '77's thread:
https://www.3geez.com/forum/showthread.php?t=68441
Picture
'79 on left, '77 on right
Note the smoothly blended lower front edge of the wheel-arch of the '77, where '79 & later models wheel-arch continued to protrude from the surrounding metal all the way down. & note how much higher and rounder the upper middle peak of the '79 wheel-arch is compared to that of the '77.
The earlier '77-'78 front panels certainly are harder to find with Honda still gaining buyer acceptance & increasing production rates as the years went on (hope the old panels are repairable?).
Ignore my '79's custom wheels & removed badges, side-trim & side indicators which originally were exactly the same.
Underneath the changes were even more extensive with a new engine, gearbox, electronic ignition distributor, wiring, longer rear suspension A-arms, new rear struts with revised mountings & angled spring mountings, new hand-brake cable arrangements & revised evaporative emissions. Not even the fuel door is interchangeable.
So LOTS of little changes occurring every year, particularly between '78 & '79, though lots is also still interchangeable & small trim pieces like mirrors & aerials might also come from Civic.
Regarding interior:
Picture
(please ignore that horrid wheel cover fitted by previous owners)
Soap & water shouldn't pose any problems for vinyl seats & door trims. Though the pinstriped ginger cloth seat inserts wear through to show more of their underlying black threads.
Could the German Honda forum I found through the Nipponklassik website also be of assistance to you?
Bookmarks