OK, I think I am finally done with this. Five 5mm leds in a daisy chain, four blue, one extra-white, One chain around the speedo motor, one around the tach. That's in addition to the six that I already had in there, and led bulbs in the sockets. Sixteen blue leds in total, let dere be light an' all dat.
The new blues are flat-tops, backs on the white plastic housing pointed at about 45* to spread the light across the back of the dials better. I used clear tape to fix the pigtails to the housing. The green film is intact, but I have a pretty darn even light distribution now. Three white leds point at the light pipes on the back of the dial plastic base and light the needles. There could be more red in the output, but at least I can see the needles now. My redline area is a little dim, but at this point I can deal with that.
Pictures when my better camera gets back here.