Your stock intake will work however it is definitely not the best intake for this application. Especially if unported it will not flow enough to make the advertised horsepower. But it will work. Don't know why they would say you will have a vacuum leak.
You really should get a better converter. Lots of guys are pretty hot on
www.edgeracingconverters.com right now and you might want to give them a call, let them know what you plan to do and they can recommend one for you.
And a good stacked plate trans cooler is never a bad idea. Heat is the enemy of any automatic transmission so the less heat the longer the life. If you do put a converter in it you will DEFINETLY need a cooler. The added slippage from the converter will add more heat.
Some guys have no problems with the AOD and beat on them pretty regularly while other have serious issues with just a mildly modified car. Here are a couple of things do to the AOD to help it survive:
Trans cooler
Shift kit- either a Baumann,
www.becontrols.com, or Transgo (note that some guys have a problems with the transgos shifting into OD under WOT even when the shifter is in D, I believe that this is caused by installing their hi-rev kit. I didn't install it in my 93 and have no issues with it shifting into OD.)
Larger overdrive servo A, A+ or A++. The OD band in the AOD is a weak link and cannot withstand WOT in OD, it will burn up and then you have a really heavy 3 speed. Ask me how I know
Also DO NOT do the 1 D 1 shuffle. If you don't know what it is I won't tell you, so you don't try it, and if you do know what it is don't do it.
Check out
www.clickclickracing.com for other ideas on the AOD.