Yes!!!! You have to get the engine back to top dead center on cylinder one. Also make sure that it is on the compression stroke and not the exhaust stroke or you will fire 180 out.
The Camshaft sensor is located in the distributor.
yes, under the rotor in the distributor
It's located in the distributor under the rotor.
As long as you marked or took note on what position the distributor cap was in when you took out the distributor, you can turn the distributor gear 180 degrees and reinstall it. There is a flat piece in the end of the distributor that looks like a flat head screwdriver and sometimes that turns when you take the whole thing out. This would put you 180 off on your timing. Try that and then reinstall and that may be your only problem.
It is in the distributor.
YES, The 350 Vortec does. It is in the back top side of the engine. All the plug wires go to it.
Standing in front with the hood open, looking at the distributor, #1 is at the 6 O'clock position, from there clockwise it is 1, 6, 5, 4, 3, 2.
Yes.
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NO.
Remove the distributor and set it up in a press or vise of some sort. Press out the roll pin that retains the gear and install new gear. This would be the time to use shims above the gear to minimize end play.
where is number one on a vortex 4.3 v-6 distributor cap