Anyone else using MegaSquirt on a LA motor?

There's no comparison to the 'stone-age' ignition and vacuum curve in the old mechanical distributor setup.

Agreed. I have a Holley Terminator EFI/distributorless setup on my 408, a Ford EDIS distributorless setup on my 440, and soon will have a Megasquirt EFI/distributorless system on another 440.

To heck with the old days of tinkering with advance curves and turning distributors. Just a few simple mouse clicks now. For anyone wanting to go distributorless, I have some crank trigger wheels for sale here in the mechanical parts for sale forum (shameless plug).