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 " "

no vin on all motors all 3 same casting date on engine , trying to find out why no vin ? hard to believe all three warrantee with all dates that close. I understand schedule dates but everything jives for same time period. where there only certain dates they cast blocks? did they do them like they did for hemi"s in batches ? trying to verify if theses could possibly be orginial blocks, but need more info , can you help?