Is your valve cover smooth or have bumps?
That's not a very good indication. The valve covers are interchangeable on the B-Series non vtec engines... And the B18B and B20 have "smooth" surface covers.
Agree'd to the picture, That stamp will tell you what engine you have... And decode the vin and you'll find out what you have.
Here's the Vehicle Identification Numbers from the 92 and 93 Integra Service Manuals. This includes US and CDN models.
Example VIN
JH4DB2381NS000001
Seperate the VIN like this
JH4 DB2 3 8 1 N S 000001
JH4 = Manufacturer, Make and Type of Vehicle
JH4: HONDA MOTOR CO. LTD. JAPAN. ACURA Passenger Car
DB2 = Body Type
DA9: INTEGRA 3D-Hatchback 1800
DB1: INTEGRA 4D-Sedan 1800
DB2: INTEGRA 3D-Hatchback 1700
3 = Door and Transmission Type
3: 3-door 5-speed Manual
4: 3-door 4-speed Automatic
5: 4-door 5-speed Manual
6: 4-door 4-speed Automatic
8 = Vehicle Grade
4: RS
5: LS
6: GS
7: GS with leather seats & steering wheel cover
8: GS-R (3-door only)
8: LSS
1 = Check Digit, disregard
N = Model Year
L: 1990
M: 1991
N: 1992
P: 1993
S = Factory Code
S: Suzuka Factory
800001 = Serial Number
U.S. Model: Starting from 000001
Canada Model: Starting from 800001
Since you said your VIN is "jh4da9451ns036038"... It's a 1992 Automatic LS. (Just as R13 said)
A easier way to tell them apart in a pinch is the options... GS's have all the options as a LS but have ABS brakes, On LS's everything is optional but ABS brakes was not available, RS's have black non foldable mirrors, black door handles, no power options and slider nobby thingy climate control... GSR's of course have a B17A1 VTAK engine, painted moldings, "VTEC" on the fender molding, Spoiler with 3rd brake light and no brake light in the back window.
