I know this is a strange sounding thread but.....
I have been trying to run
down an annoying tendency my car has to lurch when I get off the throttle or
under light constant throttle.  I thought the lurching was related to the
clunk but I have been unable to isolate the problem.  I've checked all the U
joints, replaced the differential with an LSD diff from a Q 45 and the
lurch/clunk is still there.  I have checked the trans mount bolts and the axle
bolts on the trailing arm and they look fine.  
I am beginning to suspect
that the problem may be related to the S-2 cam and lightened flywheel I
installed during my engine rebuild.  My son said lurching of this sort was a
problem on Mustangs with high lift cams and that the fix was to drill a small
hole in the butterfly of the carb.  Any thoughts on the butterfly hole idea or
any other suggestions as to the source of the problem?
Mike Lunsford, 1970 TR
6   
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