Yeah, there are a few guys on here that scour those sites finding engine blocks, trannys, etc. that have numbers in the hopes of notifying someone who may have the original car. I've seen some guys post too that they have a certain block or transmission available in the hopes that they could match it up to the original car. Definitely a nice pursuit. I posted a message on an engine block I own in case someone ever searched the numbers and found it on here.