The correct guided reamer that Bill offered above is what you need. .921 is correct. I did mine a few years ago and my 41 ford with same type of tool but different size and it does a great job. Basically the tool is the line bore when you can go at it from both sides.

I found both on ebay for pretty cheap. All I did was find correct part number from a early magazine and it popped right up.

Last edited by Barnfind49; 11/08/2025 2:01 PM.