You mentioned it needs a repair, but you don’t mention the nature of that repair.
If on the odd chance that there is a cracked casting, the common method from my experience (circa 1975) was deep brazing. That method rarely was permanent.
There was a company in Long Island City or perhaps the Bronx, called Metalock Stitch Company. They had a patented method that literally sewed the crack using malleable steel rods.
That patent apparently has expired and Metalock seems to have disappeared. There are several others doing similar repairs now.
I know that one of our customers had a cracked ram on one of his punch presses (probably about a 60 ton press). It was repaired using the stitching method and held up fine for the 4 years I was still in contact with that company. For all that I know, the repair could still be good.
In case the repair needs a cracked casting fixed, here is the search. (And it appears that some improvements have been made in the process.)
https://www.google.com/search?q=lock+stitch+cast+iron+repair+metalock+stitch&client=firefox-b-1-m&sca_esv=8e90aa19ff011ac7&sxsrf=AHTn8zpy9_FXyFa-GAqzEL9mVN5wdvDAwg%3A1743947434871&ei=qobyZ6jxNP-uptQPtrvh-Qo&oq=lock+stitch+cast+iron+repair+metalock&gs_lp=Egxnd3Mtd2l6LXNlcnAiJWxvY2sgc3RpdGNoIGNhc3QgaXJvbiByZXBhaXIgbWV0YWxvY2sqAggBMgcQIRigARgKMgcQIRigARgKMgcQIRigARgKMgcQIRigARgKMgcQIRigARgKMgUQIRifBUjHXVCBC1jDJHABeAGQAQCYAWagAZIGqgEDOC4xuAEByAEA-AEBmAIKoALTB8ICChAAGLADGNYEGEfCAgYQABgWGB7CAgUQABjvBcICCBAAGKIEGIkFwgIFECEYoAHCAgUQIRirApgDAIgGAZAGCJIHAzQuNqAH7TiyBwMzLja4B7UH&sclient=gws-wiz-serp