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Considered the "1200" because of the engine size
Civic debuted in 1973 that achieved more than 40 mpg on the highway with dimensions
with a 86.6-inch wheelbase and 139.8-inch overall length. Powered by
a 1170cc EB1 all aluminum engine except for the cylinder liner, with
the 2 speed Hondamatic or 4 speed standard transmission made this
quite the economy car to drive. In 1974 the engine grew to 1237cc
EB2 and grew 146.9-inch in length. The cylinder head is aluminum
with a cross flow design, intake ports on the back and exhaust on the front
side. This design generally produces more power than others
with both ports on the same side.
In 1978 the cylinder head (EB3) was
redesigned with larger intake and exhaust valves and larger
straighter intake & exhaust ports including a deeper combustion
chamber with domed pistons. This engine design lends is self to high
performance modifications. This design has won many racing championships
including a great Canadian driver Jacques Villeneuve or
American driver Adam Malley still racing his today.
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How to identify a 1200:
-1200cc engine, designated EB1,EB2, or EB3
-Engine will only say Honda on the rocker cover
-Hose for air filter goes to passenger side fender (if it's still stock)
-Water pump is on the front drivers side and alternator is on the back
-Fenders shorter in length than the CVCC
-2 spoke black steering wheel
-Hondamatic or 4spd transmission
Standard 1200's never received a 5spd transmission
Only the Canadian 1978-79 Special X version received the 5spd transmission
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Year/Model
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Motor
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CC
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Bore
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Stroke
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HP
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TQ
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Compression
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73-74-1200
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EB1
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1170
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70mm
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76mm
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50 @ 5k
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59 @ 3k
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8.3:1
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74-77-1200
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EB2
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1237
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72mm
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76mm
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50 @ 5k
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60.5/65*
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8.1:1
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78-79-1200
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EB3
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1237
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72mm
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76mm
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50 @ 5k
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67 @ 2k
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8.1:1
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**Notes:
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74-76 1200= 60.5lb-ft @ 4k, 77 1200= 65lb-ft @ 2k
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Additional Information
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-73-79 Chassis code was designated SB
-74-77 1200: EB2 motor had 2mm larger bore increasing displacement and power slightly
-78-79 1200: The EB3 was very different from the previous years. The most notable
differences were the domed pistons and the new head (dished combustion chamber and larger
valves).
-73-79 Civics did not have trim level specifications but were differentiated by their
motor types
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 How to tell the difference between an EB2 head and an EB3?
The EB3 head has the letter H stamped on the front passengers side of
the head by the treaded mount.
EB2 head has the letter S in the same
position
How to tell the difference between an EN1 head and an EB3?
The EB3 head has a threaded mount on the end opposite the timing belt for the torque rod.
The EN has a torque rod mount on the gearbox.
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Factory Accessories and options:
-Wooden 2 spoke steering wheel
-Floor Console
-Overhead Console with built in clock
-Rear roof liner speakers
-Dash Clock
-AM/FM Cassette Radio
-Rear wiper
-Roof Racks and many more
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