Look up Mr. Morris Eddy. He's on Facebook and lives in Texas. You can reach him @ (817) 442-0479. If you have a Stewart Warner speedometer Eddy's Speedo Repair will calibrate it and make it like new.
Papanick did mine too. 8 day turn around! I put the speedometer in and it acted up. Contacted Papanick and he said "send it back." He went over it again and I had the same problem. We researched it again and found that it was probably the cable. We replaced the inner cable and the problem persisted. Decided to change the entire cable and housing. Called Snyder's. They were out of stock. Called Bert's. They were out of stock. Called Mac's. They were out of stock. Called Bratton's. They were out of stock and told me they all get them from Snyder's. Anyone have a new one that they would be willing to part with?