Supercuda's on the way back...after18 years!

Ya A56 , in the interest of helping out the hobby, I'll send them the correction but it really pisses me off that little ole me has to be responsible for some major corporation's quality control. I paid a lot of money (over 1000.00 Canadian) for the wiring harnesses I bought from this company. I didn't cheap out and buy Chinese junk but I'm still no farther ahead. Don't get me wrong, the harnesses look factory correct, have the correct types of pins and connectors, the wiring colors are dead accurate.
Why, after all this couldn't they put in the proper checks and balances to make sure it was correct?
They dropped the fu%king ball !! No sense saying buy local if the quality is no better and still charge premium price!!

Sorry everyone for the rant but this really pisses me off!!!

Is it possible that this harness fits multiple years and newer cars are pinned differently?