Whats better,grinding a crank or line boring?

The nice deal with a K1, you can get a BB Chevy pin on any stroke crank they make IIRC. That opens up a slew of different rod lengths to choose from. One thing that torques me about most 4.15 crank suppliers is they use a BB mopar pin which limits rod length choices and forces you into that crazy short piston if using a B block.