Yeah,
I thought it was funny also
I was hoping I was reading the sarcasm correctly!
The 4l60 is not as weak as some make it out to be, but it does have its limits. I put all the typical upgrades in mine for the avalanche but did not do the input/output shafts nor 5 pinion planets. Alot of people upgrade to a 5 pinion but I've found that its not really necessary. This is like a ford vs Chevrolet kind of argument in the transmission world. Some swear by them, others don't. The biggest argument for or against the the amount of material you're losing to add the additional planetary vs the amount of coverage the planetary has with the addition of the 5th one. Everyone can make the decision for themselves.
The major places to upgrade is definitely the sunshell, wide band, servo, and accumulator pistons (I prefer pinless setups), and Kolene steels for the 3/4 stack (especially in the heavy full-size SUV and trucks). You can also do things to the valve body and separator plate to help with oiling but those are a case by case deal. I don't think you're building the trans at this time but when the time comes, keep these parts in mind.
You probably will get away without the stall but your drivability will suffer. If you've never been in a car with too tight a converter, you'll see what I mean when you start trying to drive it. I've given my 2 pennies. Thats all I can do.