Thanks everyone! I had considered the 2 fuel pumps. Did change the check valves about 5 years ago. So, pull on wire to one pump. If nothing changes, then the other pump OK. Then reconnect & try same to other pump. If 2nd OK, then I'll look elsewhere. Or if engine dies, I found IT.
Yes, gaped plugs correctly. Rechecked them again. All in spec. As is dist & rotor.
I may return to the old FPR. Just for kicks.
The cracked hose is small leak, but into the fuel regulator. So, the regulator is not getting sufficient high vacuum. But then, high vac is when I'm accelerating, which is no problem in my car. Only at low vac is there a problem.
I have also read that topping the gas tank could cause fuel accumulator to head south. Are there other parts of that emission system that can influence RPMs/operation?

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BnObob (for the fallen flag railroad.)
Artic "Snow" White 1989 300E, 124.030
w/ M103 engine, and 106K orig miles.