this is a stupid question but whatever gotta learn some time i have a 90 civic si and my b20 has all ready been installed i just need a wiring harness for it so my mechanic told me i should order a conversion harness for 275 freakn dollars from hasport and i dont even have a core for them to build 1 so that would be even more money and time which i dont have. so my question is cant i just find an original out of a obd0 90 si and have my mechanic solder the new clips and such on? he told me it might work he would have to look at it sooooo b4 i get potentially fucked over sum 1 help me pppplllllzzzzz!!!!!!