the jumper harness just plugs right in and you will need to run 2 wires for vtec, the shifter and everything just bolts right in you will need a 5spd center consle. and you will need to jump 2 wires where the auto shifter was to bypass the neutral safety switch so it will start.
Uhm, no. Stop right there, you obviously have no idea what you're talking about. The manual parts do not just bolt right in. The center tunnel and passenger/transmission mounts are different. There's more wiring to the swap as well. You dont need the manual center console, you simply only need the shift boot, the consoles are the same.
I dont know what parts you have but here's a quick run down of what you will need:
auto to manual conversion mount -- Innovative makes this mount (works well, I used it in mine previously.)
-shift linkages w/shifter
-shift boot and knob
-cable transmission s1, a1, y1, ys1... etc
-clutch kit
-flywheel w/bolts (pressure plate and flywheel mounting bolts)
-MANUAL axles
-MANUAL intermediate shaft (for cable transmission)
-clutch cable (buy it new, they're cheap)
-manual pedal assembly (90-93 Integra only)
You will have to make new holes a lil further back on the center tunnel to bolt the shift linkage to, as well as seal up the hole where the shifter cable passed through to the transmission.
When you do the wiring, DO NOT CUT any wires. I can't remember the exact wires you splice together, but theres more to the wiring that what hondafreak mentioned. I know you splice two thick black w/white wires together and then you have to ground one wire to the frame. One is so you can start the car, the other is so you can remove the key.
You will have to drill the firewall for the clutch cable to pass through, as the firewall is not predrilled.
Here... this will help!
http://www.honda-tech.com/showthread.php?t=2304301
Cant comment to much on the OBD1 conversion because I bought my engine harness and jumper harness from rywire premade and plug-n-play.