TDC Reference Angle for LS vs Northstar

[The Dark Side of Will]

I'm trying to run a 2006-2011 Cadillac Northstar with 58x crank trigger and 4x cam trigger using the E38 ECM from a 2007 Corvette.
Do those two applications have the same TDC reference angles?

I've found the following on this forum:

The GM 58X reluctor commences the indexing notch at 30 deg ATDC on #1 cylinder. You could call GMPP and check with them too. Or confirm with EFI Connection if you are buying a 4X dist reluctor from them.

So I'll be looking at my spare NorthStar crank over the weekend to see if it looks like the Northstar is similar or radically different.
It would be great to put some actual numbers on it.

I've used HPT before and it can't show the TDC reference angle. Can EFILive do that?


Thanks!