The carbs went on easy, my OE carb insulators have held up pretty well. But I was having a heck of a time with the airbox. The intake tubes are as hard as a rock. I've been keeping them oiled in hopes of softening them, but it didn't help nearly enough.
A golf ball is 0.100" bigger than the carb opening. I shoved 'em in and gave it 5 minutes at 200f, then shoved 'em in some more and another 5 minutes in the oven. The golf balls kept it warm until I got outside. The airbox went on as easy as pie.