running horribly rich

Here's the scenario:

1600 DP with a new SVDA dizzy from A/C.net, I believe it was a compufire
pickup I installed in it (also new), the valves were adjusted and then
checked after I started having problems and all was good. It started
misfiring and gradually running rougher over a period of time (about a week)
while I was installing a oil pressure guage, oil temp sender, air/fuel ratio
meter and all the senders. Next thing I know it won't start and I find the
oil smelling like gas! Drained and refilled the oil and changed the
seriously fouled plugs for new ones and it fires right up. Problem is it
will only run with the choke fully closed but the raw fuel smell coming out
of the exhaust has basically gotten me nauseous (sp?). This carb has been
rebuilt by me and set to the starting point as per several sites on the
internet and also the rebuild intsructions. It's such a simple carb I can't
see how I could have screwed it up. My neighbors and myself felt it was
probably carb related but after dropping on a known good carb it did the
same exact thing..... the only way we could get either to idle after the
choke started opening was to turn the bypass screw many turns out. The
volume control was set at 2 3/4 out on both.

I'm at a loss now...... the only thing I can think of now is the ignition
giving a weak spark. I'm open to any sugestions though of course. Two
things I forgot to mention, I replaced all the intake gaskets and seals and
had it purring like a kitten about a month ago (had an intake leak). I
also did a compression check with all the plugs out and got 160 across the
board. I was almost hoping to see one low just so I would know what the
problem was!

Thanks for any ideas/suggestions guys...... oh and Happy New Year!

Mac

75 Baja
70 Bus
70 Ghia