I always use anti-seize on the threads when reinstalling them.
I don't buy any of this "platinum".... of whatever they can say to make it cost more BS. Autolite 25s are my favorite. Gap them, I think the stock recommended gap is .054" I usually make them a bit tighter, maybe upper-.040" range.
Don't crank the hell out of them when tightening them. The stock specs is only 7-14 lb ft for iron heads if my memory serves me right.
'94 Laser red 'vert. Still a 5-oh... for now