I have the Bogen amp back together. I mounted the new filter caps on a pair of terminal strips. The input is now 67K on the grid with a 1 meg to ground.
It doesn't sound bad. When it's dimed, it's a little farty, but rolled off a little the bass response is ok. It's a bit noisy, but for the first fire-up I'm happy. I'll check some voltages tomorrow.