As far as '807' linear-amp designs are concerned, it's worth remembering that the STC/Brimar 5B254M was essentially an 807 electrode-assembly fitted into a more-modern 'bottle' and base.
http://www.r-type.org/exhib/aab0149.htm
There are plenty of designs for 1950s/1960s linear-amp designs using the 5B254M in SWM, RadCom, the various RSGB handbooks etc - it could be worth seeking out a few of these for circuit-inspirations!
[Don't copy them slavishly though: the 5B254M and similar had shorter lead-out wires so significantly lower inter-electrode capacities. You may get away without neutralisation with one of these whereas the longer grid/cathode/screen-leadouts of an 807 could be sufficient to make it hoot impressively on the upper HF bands!]