Rodinal 1+25 will accentutate the granularity of the film
and give you a fairly normal tonal range.
A starting time would be 11 minutes, and expose at 1250 - 1600.
The high pH what does the trick.
Raising the temps for Rodinal doesn't do anything but reduce your control,
by making the reaction go faster. It also is harder to keep the temp steady,
so it is harder to hit your target development.
PyroCat will - like Rodinal - show the grain clearly.
FX1 would also do the trick.
In each case, you'll get sharp and clean grain, because that is what is in the film.
It will look like a 0000 Rapidograph pen stippled your image.
Printing on a higher grade of paper will bring this out further.
If you want to reduce the acuity of the grain.... make it lumpy and less engraved,
overexpose the image by a stop or two. Be hard to print, though.
Finally, you can try 'pushing' a slower film, like HP5 or FP4.
Tri-X in Rodinal is a classic, although improvements in the stuff recently
have taken the '60s right out of it.
Maybe one of the Efke 400 films will be a better choice, dunno. Push it to 1250 -1600.
Gotta run, I'm having a flashback.