Naw, you don't want that dude. Block sucks, trust me I am a future LAMA. You want the "or better" part. Then go 5 mph (or .63 mach, whichever is slower at your altitude) and fudge the out time as 10 min early, and the in time as 13 late. If the bus has ACARS, MEL it or release the p-brake and hand the paperwork out the window. Half the time it works all the time.