Many thanks to moparx who sent me a 1/8 NPT tap and several hex head plugs at no charge!, I'm much improved and nearly overlap free. There is still a slight bit. I used a 5/64 (0.078125) drill bit for the hole. I would really like to get rid of all the overlap, but I'm just not sure that's possible without changing out the 5.0 lever. I guess a slight bit of overlap is ok?

1970 EK2 T/A 727