I like this guy's write-up for his Megasquirt installation:
An interesting point is that he installed Megasquirt first to replace the distributor using EDIS, then later implemented the fuel injection portion of the system.
So, you could go EDIS to repalce your distributor and still run the Land Rover ECU...
Some quotes from the article re: ignition
Update: No ignition table tweaking needed. Tim’s advance map is fantastic. I had a slight mis-understanding about where to set the baseline timing for “limp home mode”. I essentially had the VR sensor 1 tooth off. To correct this in software, I set the “Trigger Offset” parameter in MegaTune to -10. At some point, I need to physically reposition the VR sensor so that “limp home” will be optimal. Once that confusion was cleared up, I was off to the races.
So how do I like it?
It’s amazing .
I knew that ignition timing was an important variable in engine performance, but I honestly didn’t expect this much improvement. The motor runs so smoothly throughout the RPM range, it just climbs and climbs. I can’t keep my foot out of it. Totally programmable, solid-state ignition with vacuum (MAP sensor) advance works really well.
Distributors are kind of garbage.
I can’t wait to install the fuel injection.