Biggus
The way you are thinking is fine, just a couple of points.
300 Vietnamese is vastly different from 300 Americans,
even in the 60's and 70's and I would imagine Argies
are of a similar western size.
So overloading is one thing - 60 - 90 Combat troops - but factor
in the size of the people.
"If you could put say 500 specialist armed troops"
In 5 Hercs ? or are you planning to use other planes ?
Secondly, the plan has bugger all reserve built in. Lets say you lose
1 or 2 of the 5 Hercs, is the plan still viable ? And since you say the
planes are not going back, no chance of them doing another load.
So is 3 over loaded planes full enough ?
"pre infiltrated SF units" would be the best way to get more
on the ground but again, what if compromised ?
Support / Resupply ?
If they get into a prolonged fight, who / what is going to resupply
them ammo, food etc.
And the above is not taking into account 3 to 1 ration needed to take
whatever.
And what about people in the rest of the Falklands ? Once it starts,
they will take up arms and join the fight so the Argies will be fighting
even more people.