I have an old david bradly mower that doesn’t have a sickle blade on it and I was wondering if anyone knew if any other blade assembly would mount to it, I also have an old mccormick deering mower that has a 3 1/2 foor blade with a dry gear case on it but it also needs a different blade on it. I know a ford 501 blade will work on some mccormicks but I don’t know if it’ll work on the david bradley. Any info would be greatly appreciated thanks.