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Smiths Fuel Gauge Wiring, + vs. - Earth

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PDSB

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I have been following the instructions on the attached feed ( > Fuel gauge function - b < ) about stripping down an MGA fuel gauge. Towards the end, I realised that all his wiring is for a negatively earthed car and my Healey is positive earth. Does this make any difference? Will all the values be the same if I just reverse all the wiring?
 
I have been following the instructions on the attached feed ( > Fuel gauge function - b < ) about stripping down an MGA fuel gauge. Towards the end, I realised that all his wiring is for a negatively earthed car and my Healey is positive earth. Does this make any difference? Will all the values be the same if I just reverse all the wiring?
No difference.
 
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