https://www.rockauto.com/en/catalog/ford,1930,model+a,3.3l+200cid+l4,1485459,ignition,ignition+breaker+points,11337
https://www.rockauto.com/en/moreinfo.php?pk=660773&cc=1485459&jsn=391&jsn=391&jsn=391
FYI, another place to order from.
Those cracks could have came from a large pot hole. The whole suspension to and fro is referenced to that area via the motor mounts to the rest of the car. Cracks are common to that piece.
Check the junction box terminals between the box and the firewall, the repros would easily short due the heads protruding beyond the box although with the age of your A it sounds like you have an original, but it's something to check.