Please help. I'm at wits end and am almost broke =(

I have a 1999 Dodge Ram 1500 4x4. 318 engine, auto trans, extended cab, 129,000 miles.

Recently my rear brake line (the long metal one) corroded out and I was forced to drop the gas tank to access it. This was not too bad, actually, as the truck had lackluster performance previously and the fuel pump/filter were pointed out to me as likely being the problem (factory pump/filter at 130k = bad, I assume).

After replacing all the metal brake line (and the rear brakes, spring kits, and both rear cylinders. Grrr), I proceeded to install the new pump into the gas tank, and reinstall the tank. I then bled all the brakes, and added 1 gallon of gas to the tank.

Also, while my wife went and picked up some more gas for the tank, I replaced the battery with a brand new Interstate.

I am telling you all of this because I believe something I did may have started the trouble I will describe in a moment. Although this truck has always been a bit short of power (it tends to "bog" out when you ask it for some power), it has always started like a dream, ran smoothly, and has never stalled.

After the brakes, gas tank, and battery were all finished (and another 3 gallons of gas added of course), I proceeded to take the truck for a spin around the block a few time to test the brakes and engine. Everything seemed wonderful. Brakes were better than ever, and the engine seemed a LITTLE but better (or maybe just wishful thinking).

Today I took her out in the morning and while cruising the 3-4 blocks to the gas station, it suddenly just stalled. It did not run rough, or give any warning, just POOF. I put it in nuetral and it started back up "fairly" easily. I figured she was a bit too low on gas, so I filled the tank completely (thank god I was close to the station). I drove for less than 10 minutes after this and the engine just shut down completely 3 more times, with no warning. 2 of the times it started back up easily, and 1 time it did not (took 2 minutes or so). I noticed an ODD smell the entire time I was having these issues.

This is what has been recently done to the truck (all at the the mechanics except for the brakeline, fuelpump, and battery I just did): Plugs, wires, cap, rotor, (2) O2 sensores, cat. Convertor, trans filter, air filter, a "fuel system cleanout". Whaterever that really is lol, fuelpump assembly, brakes/brakelines, and battery.

What I've noticed so far:

The truck will do this when it is just sitting there at idle. It will do it while moving, seamingly at any speed. There is a better chance of it happening when I hit the brakes. I notice the idle drop a hair a split second before she dies. There are no error codes. There is a really funny smell. All of this started happening after I changed the fuelpump assembly, brake line, and battery.

I hope this is enough for someone to help me, as without this truck I cannot go to work (I work out of it), and without going to work, I cannot afford to take the truck back to the mechanic =/

PLEASE help =/