Looks to me like you have an exact same model as my second one....I have an 86 Cali bed model and an 83 japan bed model....
If your reverse lights are in the roll pan then it's an 83' standard model with a 2.4 liter z24 motor...look under the truck or the center console if the center console is long/ short it'll tell you if the trans is long or short, or if looking underneath the back of the trans from shifter to driveshaft flange is long or short should tell you...although 4wd are shorties due to the transfer case and 2wd are naturally long...I believe it's a r180 or c200 trans
can't find it grind it!!!!