Quote:
Originally Posted by cars2cool
... I'm gathering parts for a '56 F100 rebuild and want to install either a 292 or a 312 Y-block ...
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While you're pondering all your other choices, something else to keep in the back of your mind...
The Fuel & Temp gauges in a '56 are originally one-year-only parts. The '56 Temp sensor is a larger size than the '57+ versions. You may need to change the Temp sensor bushing in the head to the larger thread size (3/8 NPT) or tap & re-thread the bushing if you use '57+ heads.
The '56 gauges & sensors are spec'd to work on a full 12 volts. '57+ uses a small dash mounted voltage regulator just for the gauges (approx 7v). They won't work correctly mixed together.