[51woodie]

Ken/Alabama has a good point about the ign. sw.. I had to do the one for my '46, as I was getting intermittent ignition problems. If your has not been apart, you will need to drill or grind away the "crimps" (look closely at the bolting flange) at the mounting holes to split the case. Take note of the position to the sliding piece (see arrow on pic) when you reassemble, because the slot in it has to align with the pin on the switch lever. After you have it cleaned, put a short piece of tape from the back plate to each side of the case to hold the sw. together until it is bolted in place. Put a bit of Vaseline on the sw. contacts before assembling.
Make sure the lever pin is in the sw. plate before tightening the bolts, or you will damage the switch.