This link is for a similar question:
https://www.practicalmachinist.com/v...epairs-207306/
There is a maybe on solder but a person would want as much tin as possible. The connecting rods are a lot easier to rebuild than the blocks. I know your in an area where there aren't a lot of Model A rebuilders but there may be someone close to you that can work babbitt for general purposes. The rods can be poured again and each one fit to your crank as needed or just refit the bad one if you want. It would last a lot longer than way.