Anyone else using MegaSquirt on a LA motor?

I've had the module working nicely during a benchtest on the lathe for a while.
But while the setting up the benchtest on the car I toasted it.

I'm currently running with 2.5ms dwell without issues with the HEI-7 + MSD TFI e-coil.
Seems to be enough. My engine cuts out with 1.6-1.7ms dwell.
Nothing gets hots even after some extensive idling.

Yesterday I've started playing with the dwell table to increase the value (to 3.0) at higher engine loads, thinking a slightly better spark won't hurt since my engine doesn't spend much time at high loads usually.
I have yet to find out if it really helps with anything though.