I went ahead and modeled the 76 to double-check my SWAG. Below is the schematic, and also Gary Kaufman's similar line stage.
Stock JE Labs gain is 9.2X or 19.3dB gain. -3dB at 26kHz with 250K volume pot set at 50%.
I would probably change to a 100K pot, which would mean -3dB at 66kHz with the pot set at 50%. You can also remove the cathode bypass cap and change the gain to 5.2X or 14.4dB gain. -3dB with 250K pot at 46kHz. -3dB with 100K pot at 115kHz. Upping the output cap to 0.47uF is probably a good idea, too.
Shannon