I have a couple of questions.  I have a 68 camaro with the temp sensor in
the water neck .  To get the electrical lead to the sensor I had to splice
in a length of wire and soldered both ends.   The temp gauge reads
high--note that the sender is the right one for the gauge.  I wonder two
things:

1.  Could soldering affect the line resistance and the gauge reading?
2.  Is the water neck location significantly hotter than the original block
location (which I can't use because the appropriate sender is 1/2 inch and
in the newer motor the sender is tapped for a 3/8 inch sender).

Thanks for your thoughts.

Steve