1963 Pontiac 421 SD Engine Block, model #544988, block code 135U. Only 1 missing cast that can be fixed. Just had it dipped and magnafluxed showing no cracks. I inherited this from my deceased father in law and just trying to sell for family. I'm in no way an expert, but I've got a lot of feedback that this is a rare and desirable block. Lots more pics if you want to see more. Local pickup preferred, unless buyer pays shipping. In Reno, NV, I don't mind driving a couple hours. I have it listed for $5,000 on Ebay, make an offer!
https://www.ebay.com/itm/304286012950