Run-on, and on, and on...

[Anders and PJ <uhlwick@mcs.net>]

Hello,
I'm new to the list so please excuse me if this topic has been covered. 
I have a '74B.  I have had intermittent trouble with my engine not
obeying me when I'm through driving.  The car runs beautifully
otherwise, not too hot under the hood, very smooth.  Can't figure out
why it "diesels" so badly.  I use Amoco Ultimate fuel.  Any insights?
Thanks, 
-Anders Uhl

P.S. I run an Ignitor ignition with a Lucas sport coil and love the
combination.