Two piece rear main seal small block Chevy305 Standard bore. Probably late 60’s or 70’s. good candidate for mild rebuild. Cleaned and inspected. Complete Short block. At least you can see exactly what you’re getting . I bought is for $400 running. Just the cleaning cost me $250 . I found a newer version 305 that need less work, so I’m going that route. My loss /your gain. Call or text 601 9003 Carmel area code