bumb?
Don't know if there's a lot of TwinMOS owners in here even though I've whored the brand around pretty good.
I can tell you though, that assuming them based on BH-5 chips you aren't going to go very high with only 3.1 voltage at all.....for 2-2-2-5 timings to get anywhere you'd really need around 3.4 voltage if not a tad more in order to hit around 250+