"Bill" wrote in message
...
I think the Saturn V could heave 100 tons into low Earth orbit...
Is it also true that the Apollo CM could have been modified for
six people just for transfer to orbit and back?

The Saturn V could lift roughly 140 tons to LEO:
http://history.msfc.nasa.gov/saturnV/Introduction.pdf

A kit was developed for the Apollo CM that provided five
couches for a possible Skylab rescue mission. This was nearly
used during Skylab 3, when a service module RCS problem
initiated rescue preparations. The problem was later solved so
the rescue wasn't needed.

http://www.astronautix.com/craft/apouecsm.htm