ive got a 91 civic hatch with a gsr swap and i think im having issues with the wiring harness i have a obd1 vtec harness laying around so my question is it possible to covert my chassis to obd1 and if so how would i go about it

 

Cut off the plugs at the ECU and hard wire the OBD1 plugs on - been done many times and really not that difficult.
Should be really easy since you seem to already have a jumper harness that will tell you exactly which wire gets soldered where.

Had part - done a handful of times because it is not worth anyone's time and effort.
Cut off your firewall plugs. Figure out what every single wire is.
Route all the wires to the proper side of the car. Solder in the OBD1 firewall plugs.

It even gets worse if you try to swap in the underdash harness. Have to figure out what every wire does on the cluster, console, switches, lights, etc, etc... whole cabin.

Best bet - get an unmolested harness for your stock specific car/engine. Modify as necessary with a quality OBD1 jumper harness.

 

so u think i should just get an 0bd0 harness and just add vtec to it

 

it should be.