warning signs of cam failure

"fast bleed" are anti pump up lifters and in Crane those are the 99278-16s. Standard lifters are... well... basically stock. Those in Crane are 99378-16s. If you're reading the catalog (and my impression is the "tech" guy was...) the write up is the same for both lifters, but only one set is really the anti pump up. As was said, anti pump ups need much less preload. Usually around .010. Standard lifters can have as much as .060 preload and as little as .020.