Now that my car is running for the first time in 20 years, I am tackling the fuel system. As the car has no pick-up or acceleration power at all. (yes the pump is rebuilt, receiving adequate power, and works like a champ).
It sounds like we're living the same life with regard to behavior issues. This is/was the characteristic of LRK37110 at the point in time that work suspended due to other life issues.
A couple of bits from my own experiences, for what they're worth. At first I thought this might be transmission related. When I had the transmission shop check things over they declared the transmission in excellent health, but made the following offhand comment, "It feels like the timing is off by about 40 degrees."
At the point my work stopped I had begun to agree with them, at least that it was an ignition problem and one with timing. I have known of cars where the spark plug wires are rearranged such that the firing order is incorrect, and depending on how it's incorrect the car may still run, and seemingly well at idle, but put it under load and "you've got nothing." The ignition timing being way off can also cause this sort of thing, too. The vacuum advance could be shot. Definitely explore possible ignition issues.
I was driving leisurely to the muffler shop to have the EGR system welded because where it comes down from the top of the engine down to the oil-pan area ant T's off, it is cracked at the original weld point. Would this cause the car to die? I know it will cause high idle (which it does)
Can't answer this one, but my gut is leaning toward "no."
Anyway, as I was driving the car just quit on me after about 2 miles. Now, it will idle fine, but when I put it into drive--- it chokes and dies.
Now this just screams ignition problems. I believe there is a post here about the Christmas Day failure I had of the exact same nature when I was out for a drive in SRH33576. She would not restart immediately, though, but once she cooled off and did she'd run seemingly normally until she didn't, and when she didn't she'd start backfiring once or twice then die - dead stop.
After much diagnostic fiddling I ended up doing a distributor transplant from LRK37110 into SRH33576 and, lo and behold!, she ran normally again instantly. I have since acquired a replacement distributor that's still on the shelf awaiting installation. I haven't decided whether to put it in SRH33576 since it's a Mallory optical RR-dedicated distributor, but not OEM, or to put it in LRK37110, originality be damned, because the Lucas Opus units are well-known for their unpredictable failures.
Do pierberg cars (like my 79 wraith) use fuel weakener filters, or no because the gas just circulates back into the tank? If so, where are they located. I haven't found one of those while looking at her belly.
I never noticed one on LRK37110, either.