Mitch---Any time the carburetor is separated from the intake manifold,
such as yours, the carb can run 'cold' when cruising at part throttle.
(Note the photo caption at the bottom of page 241, in Kastner's new
book)
There are a few things that you can do to help avoid the "icing over"
that can take place, similar to fuel puddling as when an engine is first
started from cold.
A) Metal fuel line can be re-routed to run up against the radiator tank.
This would be controlled heat, never rising above the coolant
temperature.
B) Re-routing of the fuel line to hug, without necessarily touching the
block except possibly the clips, should let the fuel warm up a little
before the carb sees it.
C) Auto parts stores sell flexible metal tubing. The 1979 Cheve V6
Monza, for one, had this sort of tube that ran from the exhaust manifold
to the intake manifold. A heat riser, if you will. It formed a column of
heat that aided in allowing a better atomization of the fuel. More for
emissions purposes, I would assume.
Move your "cold air" intake pickup back inside of the engine bay, if you
haven't already done so.
Ensure that the water tube that goes thru the intake manifold is clear,
and feels hot as this water exits. Run a Winter (1950) thermostat.
In short, try using all available engine generated heat to warm up both
the air and fuel, during these colder months.
Dick
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