Good news today , 1969 Z28, X33, VIN#124379N681968 ,i did find the vin stamp buy the oil filter , Engine cast #3970010 , proper intake ,proper heads , N681968 tranny stamp , proper Distributor , correct DZ stamped Carb , also the BU stamped posi rear end 3.73 , and also VO8I9DZ on the top pad , Made my day