To better access the drive belts, can the mower be tilted "front up" 'back down" on the ground? Will fuel and oil leak? Any other pointers?

How Long is the belt on troy build riding mower (pony)?

Hi,
Yes, it should be OK. Aslonf as the spark plug is pointed basically skyward. You may wish to teporarily remove the air filter so that if it does "drool" a little ,it will not get in the filter and clog it.
Peace,
Clarke