IIRC, the last time I got my crank wedged, I had taken everything off! :-)
But more seriously, if I may ask, where, and in what gear, do you see
yourself turning 6500 RPM, on the "street"? In 1st, it is just vehicle
abuse, and in 2nd, it would be illegal. If you are going to the drag strip,
that probably isn't the most efficient point to shift, anyhow.
Hollywood Sports Cars campaigned an extremely capable, and very durable,
3000 in the mid-sixties, which used the stock rods and crank, but they had
been VERY VERY carefully balanced and polished, so, it IS possible.