I need to find adoptor WE6550 to hook up the gas.

Try a vacuum cleaner, if the unit is small enough, place it inside a plastic bag, put the hose in one end and tape the bag securely to the hose. Turn it on and once the bag collapses it may pull it free.. Or use a safety pin, bend the tip into a small hook and try snagging it.

take a wire coathanger and make a small hook out of it with a pair of pliers..make the hook small enough to go in past the nozzle door in the fill pipe..using the entire length of the wire run it in and out of the filler and look for any obstructions inside(like a wadded up plastic bag or similar item) this is a prank thing with kids..if it continues..contact a salvage yard about another filpipe..it may have a collapsed hose under the car..you can also blow air into the tank and see if the vent hose is plugged up..

does anyone know where the small water hose goes on the back of the engine. there is a small hose hooked to a heater hose running behind the engine.one end hooks to heater core. the small one is about the size of a gas line.

You need to take it to another mechanic-the fact that this person dropped your gas tank and did not know what hoses went where says all there is to say about his skill at repairing cars...you issue is probably either a fuel line that is not hooked up properly or a evaporation line that is causing your stalling, regardless no one is going to be able to answer this question, it has to be looked by a competent mechanic.

have a 1996 Aurora. under the hood the plastic gas lines 2 are hooked up to the carb but one is broke off,does this have to be hooked up?

you hook one line to it the return line inside the tank

The line you used as a return line pull it back thru the gas cap hole and put that piece on one end of that line and pull it back in the tank until it stops and then hook the return line back where it belongs

Yes if your asking about the fuel line yes it hooks to the filter out thru the wall of the gas tank straight into the carb. if it broke out side the tank you can try a smaller plastic hose to stick inside to reconnect the two parts. if it broke inside the tank try to replace as one hose.

need to buy a gauge set up , these usually come with the hose and gauge,just attach in the back and hook up your bottle..

after jerkin fingers bloody today same problem i took carb apart,,the old hoses deteorated an clogged screen on in take side/// inside of carb plate //of carb,,blew out with choke cleaner,, reassembled now runs well make sure to run same size hoses large an small,,as original other wise floods out,,,

Try emptying the fuel tank, and with small flashlight inspect the fuel line and the sump pick-up screen inside the tank. You may be able to gently retrieve it with a stiff wire hook. See if the hose is cracked/broken of if the screen is clogged. If all is well, be sure there are no kinks in the entire fuel line. 
Hope this helps