1.) Stop posting in HTML. Text Only message boards get all screwed up by
HTML.

2.) If you have a gross trailer weight that is within the limits, but the
tongue is heavy, why not just shift the load a bit so the weight goes to the
rear?

I suspect you are trying to tow from the bumper or the factory hitch, and
you can get around the weight limits these two impose ou you. You have a
Class 1 or Class 2 hitch, the Class 3 should do the trick. I'd roll the load
a few inches towards the rear before I traded up on the hitch.

The owner's manual for my 2000 Taco 4WD V6 suggests NOT using equalizer
hitches for towing.  Anyone know why you can't do that?  I'd like to pull a
3,000 lb. trailer, but it has a tongue weight of 394 pounds.  The Taco max
tongue weight is 350, so I'd like to use an equalizer hitch to stay under
this limit.   But the manual also says equalizer hitches should be
avoided.....you see my dilemma.  Thanks for any help.

Weight distributing hitches, a.k.a. equalizer hitches*, pull down on
some of the attachments of the hitch receiver as they lever up the
back of the truck.  If the truck's frame isn't make for this load,
the hitch might pull loose.

All that said, here's the Draw-tite/Reese/HiddenHitch brands info
for your truck where they list their receiver for a 5500# trailer if
a weight distributing hitch is used (but I would't tow that much
trailer with a taco...I feel that's a real-world max for a Tundra).
http://www.draw-tite.com/fitguides/fitguides/hitch_moreinfo.asp?vid=2260&year=2000

*not to be confused with the excellent "Equal-i-zer" brand hitch
which combines weight distribution and sway damping.

Ken