I BOUGHT A SET OF HEADERS FOR A NEIGHBORS CHEVY II, A YEAR LATER HE SELLS THE CAR AND GIVES ME THE HEADERS BACK SAYING THAT THEY DIDN'T FIT HIS NOVA. THEY ARE MADE IN MEXICO WITH THESE NUMBERS STAMPED ON THE INSIDE OF THE FLANGE R 722 5 94. ANY IDEAS WHO MADE THEM OR WHAT THEY FIT?? THANKS
COYOTE