1 the door sticker says 3-70 fender tag 401, block no vin 4-3-70 2 door 3-70 403, " " 3 door 3-70 407 " "
It would be impossible for any car built in March 1970 (assuming the door stickers you are looking at are originals) to have an original April 1970 cast engine from the factory.
