Originally Posted by billydscout
I know it may take some time with the frame alignment tools, but can one cold set a steel frame to increase the maximum allowable tire width? (I would love to build a 29 inch mtb on a vintage road frame)
Yes, you can cold set, although someone else will have to fill in the details.
However, keep in mind that mt. bike geometry is radically different from road bike geometry. 29ers are usually built for that purpose, as far as I know.