Sorry, I miss your question. Lower hole was ok, I just tilted upper part closer and made a new hole. There was enough material, but no specific boss for that. And the starter pocket "nose guide" needed some trimming inside the bell, if I remember right. Which is no problem, cause RAM MP starters bendix gear is supported on its own.
Surely it would be easier to go with 143t with Dakota bell, but I got hemi alu-flywheel so cheap that I went this way.
As a pilot bearing, I was using `90-up mopar pilot bearing sleeve, and just opened the center hole for Toyota bearing, and didnt push it too deep, so the input shaft tip slide good amount in.