1969 Chevelle SS L78 4-speed block
 

Damaged block, but an original 4-bolt main out of a 4-speed 1969 Chevelle SS L78. Casting number is 3969854 and is dated F-30-9. Engine ID pad is stamped T0703JD with a partial VIN ending in 834.

Located in South Jersey and reasonably priced at only $25.

https://southjersey.craigslist.org/p...883341689.html

I know of a guy who could fix that.

I guess that's what you call "windowing" a block.