Dear Don, Nice photo of your frame. Your local parts house should have the 1" freeze plug and the felt gasket material you need. If they don't carry the felt gasket go to [
www.mcmaster.com] and type in felt for a search word. For the plug in the pump pit, check out the local hardware store for the proper one. If they don't have one, then make one. To convert from inches to metric, I use my digital caliper that I bought at Grizzly Tool for $29. With a click of a button, it instantly converts from inches to metric, and if you need to, back again . When measuring bearings, there isn't any room for measuring error as they come in too many sizes to be just close in size. 1/4" is a mile of difference when it comes to measuring bearings.