Attached is a link with instructions to install a weber on a Mazda B2200 or B2000. These instructions have been modified from the original to be more specific to you're application.
The firing order on all 86-93 Mazda B2200s is 1-3-4-2 when facing the distributor from the driver side it turns clockwise. The terminal facing the front of the truck on the distributor cap is #1....
The horn is located on the passenger side of the radiator support behind the bumper. The horn relay is located on the passenger side fenderwell. I've attached some links below for future reference.
Not sure if you want the lugnut torque pattern but here is some info.With one stud being the top center going up is number 1,number 2 is directly below it,number 3 is to the left of 1 and number 4 is...