Thanks. Will try one big whack with a big hammer on a smaller one. Seems like the trick is to hit it hard enough to "dimple" the center and spread the plug, but not so hard to distort it and cause a leak. About how much of a dimple works well - dime size by 1/8"? bigger, smaller?

NAPA only sells bags of 10, so if it fail, at least I have spares, but would rather avoid that!

Last edited by wurlitzer46; 11/08/2012 8:28 AM.
52 3100 project
54 3100 / 3112 ice cream truck, next project