Sorry to post such a weak response, I know I have a set of plans given in a "Hot Rod Yearbook" (N0. 3 ???) but I can't locate it at the moment. In any event other than give patterns for coil-over suspension and dimensions of the frame at various points it only uses checking of front-to-rear diagonal distances and unless you are very careful the result will not be as straight as a commercial jig-built frame which is not expensive for a T. Maybe someone else has that set of plans? Probably the references Tech1 has given are more than sufficient.

Don Shillady
Retired Scientist/teen rodder