We had a local junk yard Bucky’s here back in the 80S they also had 62 school bus with 409 in it but at the time I had my 64SS with327 and was not a fan of W engines yet but over the years I have found that most of the truck engines with the 2 Barrel adapter like in the photo were 348 and the 409S were 4 brl the one at Bucky’s was 068 block and went in to a tow truck