Dear wise listees [you can tell I want something]

Thank you for the responses to the transmission problem.  Turned out to be a
blown pilot bearing, apparently it hadn't been changed when the last clutch
job or two were done.  Darn

Missing.

The van started missing under load on a trip to Southern California [from
northern Cal.].  After the clutch job drove it once and it was fine.  Then
as soon as I started back to Nor Cal it started missing again.  this time
felt like it was running on 3 cylinders.  Then it would clear and  run fine,
then back to missing.

Was smogged just prior to trip and passed OK, not great though.

Had new Bosch single platinum's in it, new rotor and cap.  Changed the
platinum's to copper Bosch in Southern Cal.  Checked rotor and cap, just
generic FLAPS stuff but looked OK.  Ran the van and sprayed brake clearer at
every air bearing surface I could find, no change in engine note.

Got 20 mpg going south and from 15 to 18 coming north [against a very stiff
wind].

Any ideas what to look at from you oh wise list gurus?

TIA

Mike

Oh, forgot that I put two new wheels on it that I got from BenT.  Do you
suppose he did me in?