Crank arm removal threads are badly stripped on a Stronglight 106 (1980) crank arm. Removal tool pulls straight out when trying to remove the crank arm. I pulled the crank using a 3" three-leg puller. Can the crank arm threads be re-tapped to the larger Stronglight threading used on earlier crank arms? Is there a helicoil option for this application? Or, should I just resort to using the above mentioned 3-leg puller in the future?

TIA