GM GM D520 D531 D536 1876209 1985474 1988908 BUICK MODEL S V6/V8 74-90 CADILIAC MODELS V6/V8 75-95 CHECKER 81 CHEVROLET MODELS V6/V8 75-7 77-91 CHEVROLET 75-76 78-86 77-86 OLDSMOBILE MODELS V6/V8 74-90 PONTIAC MODELS V6/V8 74-90