The Molnar crank I have measured up pretty decent. Mains and rods had virtually zero taper and were within ~0.0002" across the board. I made the mistake of ordering my Indy Maxx block with 400 mains, so bearing selection is terrible. I ended up going 0.010" under and having the shop turn the crank where I wanted to get the clearances around 0.0033"-0.0035".