Ideas on how to convert this recipe for home caning?

No need to change the recipe at all; just process the finished product. Make a large enough batch to make canning pints worthwhile. Sterilize your jars, rings, and lids. Fill jars to 1/2 inch from top with the catsup. Place rings and lids LOOSELY on jars; place jars in water (about 1 inch from top of jars) in canning pot. Bring water to a boil. Boil for 15-20 minutes. Remove jars from pot, tighten lids. Allow cans to cool; listen for lids sealing. Any jars that don't seal can be re-processed.