Yes you can change the brackets that hold the bearings. You would need the brackets from a 1962 & newer model disc. Plus you would also need some additional parts as showm in this picture:
They are the BEARING SUPPORT #8.
Both the SPOOLS #11 & 15 (they must be the ones for your disc's spacing.
The TUBE for the center of the bearing #12 (again it needs to be the one for your disc's spacing).
And the BEARING #18.
Your disk should have 1 1/8 square gang bolts, you can get the newer style bearings like the one below:
From a supplier called The Big Bearing Store, (for a sample picture see part #ST491A)on their site.
The #ST491A sells for $15.75 on their site, or they list them on eBay for $11.75 each. To find them on eBay do a search for item #3877223946.
My local IH dealer wanted $31.50 each for the same bearing (and it it had MADE IN CHINA stamped on it).
The link to their site is below.