Unstyled A project

Hey folks! Been reading a tons of post lately, but new to YT. Ive just recently started tearing into my gramps 37 Unstyled A that has been sitting for 30 years in the back of the shop. It was locked up and fluid in the #2 cylinder. After remove the head and block the tractor spins freely. Drive train looks good and solid with minor wear from shifting. My father and I tore it down yesterday and everything looks sound and fair shape. It's all original, and everything is there. Block has never been touched with original pistons, rods and bearings. The bottom of the head has a triangle shape of iron missing which I'm pretty sure froze at one time. See below. Would like some advice on the head repair as too if anybody has had luck welding that area, and on what to do the block. The pitting on the liners is not to bad but I don't believe just honing will get all the imperfections out. Any advice would be greatly appreciated. If we do .045 the block i would need new
pistons and rings and possibly rods to where these are the early A107 con-rods. Any advice on the boring the block and .045' kits with early styled rods would be huge thanks.

Having trouble uploading pictures. Will continue to try

I wouldn't be too concerned with a little pitting
in the cylinder wall, assuming this is going to be
a show tractor.

Can't really make out the hole in the head... Is
that Bondo? Do you have the piece that came out?
Thinking a good old style welding shop could do
something with it, worth asking around before
looking for a replacement. Bet someone on here has
repaired something similar.