Need a good pic of the right side of the carb and intake.
Is there a well in the manifold on the right side?
If so then a choke (stove) thermo spring is mounted there and a cover is over it.
A rod will then run up to the choke butterfly to open and close it.
(according to temperature)
That is how my 72s choke operates.
BUT pretty sure this a 72 only deal so Im not sure about your 71.
The choke stove spring looks like this:
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72 Lemans Sport convt., 84 Z-28, 13 Chevy Impala,
94 Buick, 77 Triumph Bonneville
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