Re: Carb Icing...
Where is this grid located? When you say intake, do you mean air filter intake that brings air to the carb, or intake manifold under the carb? I don't remember seeing this on my truck. . The only thing on my truck that would heat up the air is the hose that runs from the exhaust manifold to the air filter, it's controlled by a thermal valve that runs off of vacum. It's function is to heat up incoming air by sucking in the warm air surrounding the exhaust manifold. The most logical reason I can't find it is whomever put the new engine in (previous owner) put in a newer "model" engine that does not have an EFE. It could also be I'm not looking in the right spot.
My carb acted up again today, although not quite as bad as before but it is still annoying. When I got to school I checked everything, and tightened some vacum hoses on the thermal switch, I hope this solves it.
Realizing you can't start you parts truck and test the voltage, I would check a Chilton's manual. If you don't have one try your nearest public library, the one near me has manuals for all cars and trucks. Failing that, if it's electrical, and it's on a truck, it's probably a safe bet it's 12v ( all this coming from a guy who's not even sure what an EFE looks like).
There's somethin' women like about a pickup man