The 58x stuff was primarily used for misfire detection. 4x Crank/1x Cam we use quite often with excellent results. Holley now offers a Hall Effect sensor to directly replace MSD Mag sensor for a digital conversion. We use the EFI Connection 1x Cam Sync drives in a few dozen applications...never an issue.

IMO, if your spending this type of money on EFI, its wise money spent to get the best it has to offer...SEFI and Ignition Control should not be left off the list. DIS/CnP is a nice feature bit not gonna make or break from a performance stand point.

Or you could just do an engine builders kit from Accel, dual sync distributor to run in sequential, intake, injectors, pump etc. and everything plugs right in.
FAST has them now too but not sure of their available manifold selections.
And just an fyi, Mallory as well as AEM are now making a distributor/pickup like the one pictured a few posts ago.

Cool. This is turning into some good information. I had searched a week or so back to see if another manufacturer had something similar but I failed even after looking specifically at the Mallory site :(. With your confirmation I was able to locate it. Another cool option. At least it appears that way. I'll have to see if I can dig up the specs for the sensors somehow.

http://static.summitracing.com/globa...MAA-77100D.jpg
Again courtesy of our friends at Summit Racing :). Mallory Firestorm Dual Sync Sensor product page

Freaky timing since I just spoke to their tech Monday about this and it wasn't mentioned but... I also received a marketing email from the folks at ATI today introducing some new damper shells they are producing with a 24x reluctor wheel built into the shell. Not enough details yet to know if they would be of use to a SBC/BBC conversion or not. Just that they come in 6" and 7" sizes. Not sure if I could take my existing ATI Superdamper and put the guts in a new shell or not. They are "made for AEM Infinity Systems". Here's the press release.

The Mallory stuff is out. The ATI damper release says they can retrofit.
I'm now AEM dealer as well and I know that only some of the Infinity systems are out. The system that would best run your BBC won't be out till the fall. They're still working on the software.

The Mallory stuff will plug right in to the Accel Gen 7 and Thruster but will work with just about anything.
The Mallory Firestorm box is also a CD box, providing 150 millijoules of spark power.

Hope this helps.

Primary reason for 58x (60x - 2 teeth) is can be used on any cylinder count engine with any bank angle configuration with an edge lining up for every cylinder TDC (edge @ every 6 deg crank angle).

True this impacts application, however we were discussing resolution as it implies to performance. The OEs measure the delta between the waveforms to detect changes in RPM for misfire detection. Aftermarket ECUs don't employ such srategy. The lower cost 4x Balancer he spoke of is a viable option vs the costly 60-2 version for his standard V8. One point i will mention, a DIS Wastefire can run without a cam sync (batchfire fuel strategy) in the event of a failure using a 60-2. The 4-0 must have a cam sync.

We love or self-learning Holley EFI system. Prior to this self-learn technology we'd always fly-in a tuning expert to get results. On a private jet. And put him up at the Ritz Carton. :G-Dub: And call in the escort service. :confused59: Good tuners were and are still in high demand, but for relatively mild engines, self learn EFI has it's place.

As Greg stated, decent vacuum, is important for good results. We fired up our Holley EFI on a fresh engine with only moderate vacuum. Moderate vacuum means a little more manual tuning is required. Ring seal is important as well. After a while, the self learn mode will start to second guess itself, so turn it off and let the standard closed loop function do it's thing.

DIS is not required. Taking that point further, you can get your self-learning EFI up and running with just a standard ignition, then add DIS down the line. Greater spark resolution IS beneficial for getting the most from your engine. A standalone Electromotive XDI kit is the hot ticket there. Good people.
http://www.electromotive-inc.com/products/xdi.php

It's not the most in depth article, but you might find a pointer or two in my Holley EFI install series. A lot of what applies to the HP also applies to the Dominator:

Holley HP EFI pt 1

Fuel System

There are few problems I have with a self learning systems.
One is just as you mentioned. They will have a tendency to chase their own tail on more than a mild build.
Two, if you're a novice and don't know what the correct air/fuels are to enter in that table then guess what, it'll try to hit what may be wrong target air/fuel. At that point self learning is useless.
Plus you still also have to do cold start, enter the right spark curve, play with the transient fueling tables etc. It's hardly ever the end all.

And when it comes to having qualified personel to help I'm with you 100%. There are too many "tuners" that simply don't have a clue. I've probably done or redone more tunes succesfully via the internet than some have sitting in the front seat. There are few examples right here on this site. And some of those were on "self learning' systems. Unfortunately there are a few who are in it for a quick buck and then off in the sunset they go.

Get a system that meets all your needs/wants and secure the help you need, before you get too far into it.

Thanks and best of luck in your project!!