i have a 90 integra and want to put a 94-01 gsr head on my ls block but im wondering if i can use my engine harness or if i have to get a certain year. i have never had a honda this old which is why im asking.

 

You can use your engine harness but look up obd0 to obd1 conversions as well. Youll need to wire up the vtec harness stuff, as well as the 4 wire o2 sensor. Rywire makes a full conversion kit if you dont have the wiring know how to do it.

Also look up ls vtec how to topics for more info on what youll need to do the swap. At a minimum youll want to replace the ls rod bolts with arp bolts, gsr water pump, and obd2 oil pump (along with the obd2 lower timing cover) otherwise the engine wont last long

Youll also need an obd1 gsr ecu or a chipped obd1 vtec ecu

 

thanx for your help.