Have always ran the AC Delco R43T plugs. Now Autozone says they are unavailable now. They have a R43TS that has an extended tip (the post and electrode stick out about 1/16" further than the R43T) The rest of the plug is identical in geometry/dimensions.
I'm running a small dome 10:1 piston, with stock GM iron heads. Heads and block haven't been decked or milled down.
Does anyone know off hand if I can run this extended tip plug or will the piston hit it?