Saw Stu Thomsen posted this on FB a while ago and had to grab it.    Too cool of info to lose over there. 
  
as quoted by Stu : 
  
These are photos of my old Huffy . Hadley and I were given the green light by Huffy to seek a local frame builder rather then sending our designs to Ohio. I gave what I wanted in design (demensions) to the frame builders at GT Bicycles and this is what they built. Didn't need anything fancy or cute in design.  
19.5 TT C/C Chain stay 15.5 center of BB to center of dropout.  Seat mast 10 1/8 C/C 4" head tube with small enforcement ring.  1" diameter TT tubing 1 1/4 diameter Bottom tube  I don't have forks so I don't know what the rake is nor do I know the BB height.