1971 ford cobra jet block 2 bolt main date code 1K26 Cylinder bore @ std one cylinder w/rust pitting is Very shallow barely catching on your finger nail .Block was decked. .008 and .009” Some brazing (factory)on deck surface in non critical areas .No cracks found thrust is good .Thermally cleaned &Blasted . Can help with shipping will build a box. Check out the photos and you can see the bore size 4.360. If you have any questions, please let me know. Very hard to find in this condition.