In the back of the 69 FJ55 I found an Aisan core. I got some rust around the frozen butterflies. While I don't even have a kit for this carb (and I've read.."Don't remove the butterflies"), can I soak this in carb cleaner for prep? Do I remove the sight glass/gaskets prior to soaking? Maybe that Kroil would come in handy about now? Never fooled with carbs so I don't make a move till word from the wise pigsperts--thanks for comments, Dave