Phill,
Sandy King has indicated that his conservative minimum for 4X5 sheet of the developer at 1-1-100 dilution is 80 ml.( 2 1/2 oz). He did go on to say that you could get by with slightly smaller quantities with the 2-2-100 dilution. Normally the 1-1-100 dilution is used for developing film for purposes of enlarging. The 2-2-100 dilution is used for developing film for alternative process or Azo. If it were me, I would try the developer in the quantities that you mention and see what your results are. Good luck.