No Spark, and the definition of insanity

Greeting all,

I want to apologize in advance for the lenght of this post, but I want to be thorough. Having spent a number of months trolling this site, it's time to seek some assistance to my current frustration. I bought my 90 LX 5.0 approximately 6 months ago (from the original owner) with a few issues, but resolved them fairly quickly ( dirty MAF, bad battery cables, TFI and stator). I cleaned the MAF, bought a new MSD distributor, and replaced the battery cables. Car ran strong thereafter with no further problems. 2 weeks ago, we performed some improvements to the drivetrain (shown below), and took the car for dyno testing at a local shop. During the test, the TFI ( on the MSD 8456 distributor) apparently failed, and was replaced with a stock one. We finished the tune, and I left. About 5 miles down the road, the car shut off - no spark. I have used jrichker's checklist, among other information, and have this to offer:

Coil is getting 12V, as are terminals 3 & 4 on the TFI
(Another) New MSD distributor and coil ( both swapped during current diagnosis)
Verified coil wire resistance
Fuel Pump is providing 39 LB pressure at the rail
All fusible links on starter solenoid are intact ( tested with a voltage meter)
Verified ground wires are connected to back of block
Swapped computer into another 5.0, and his car started with my ECU.
12V on the red wire going to injectors/MAF
We also verified continuity from the TFI to the ECU
TPS is set at .98
Battery cables are new, 2 gauge - battery is fully charged at 12.62V

I have not checked injector pulse, but will pick up a noid light today to verify. It appears they are not pulsing, as I don't smell fuel and the plugs look fairly dry.
We spent the better part of the last two days checking everything (twice, three times), hence, my title - The definition of insanity is doing the same thing and expecting different results - I am out of ideas.

Thanks for your assistance.

I would imagine someone must have input on this.......

A trip to the JY netted a marginal dizzy ( not many choices), but I got it installed and the car started. Noid light flashed before it fired up, telling me the PIP in the previously installed, brand new MSD was N/G. The car still doesn't run properly ( I question the integrity of the JY dizzy), but it's running.

I have to question why the car has 'eaten' four PIP's in a six month period. The factory one, one I rebuilt thereafter with all brand new parts ( non-Ford, however), the first MSD which lasted 5 months, and now this mess.

Thanks for the push to get another distributor - It was my feeling the PIP was bad, but it seemed virtually impossible that a brand new $275 high-performance part could be out-of-the-box bad. Live and learn, so they say.....

:SNSign: