the prelude is an 93, the H22 is a 97. what harness changes need to be made. im going to run the obd1 ecu. please help.

 

That shouldnt matter too much unless the motor is coming with and ODB 2 wire harness. If it does you will need a ODB1>OBD2 Conversion harness in that case

 

I just did this over the weekend. there really isnt much you need to change at all if you keep it obd1 and use a p13 or chipped p28 (i have one for sale) or p72 to run the lude. If you do this you will use the obd1 harness and distributor from your 93, then you wont have to extend the wires from the crank sensors. Then you will only need to extend the wires from the map sensor since the map is on the throttle body of the 97+ (or you can use a TB from a 93-95 and skip that) and t-off a few vacuum lines. Thats it.