Car Doesnt Start
If the timing belt went as in broke/stopped working, I don't think your engine would start. The timing belt controls the camshafts which actuate the intake and exhaust valves. Neons have an interferance engine if the timing belt broke you possibly have bent valves and the engine will spin over very fast and you will have no compression. That's probably not what you want to hear though. Cross your fingers.
It does not have a timing belt it has a chain
I know of no vehicle where the engine has to be removed to change a timing belt.
The 1997 Buick Park Avenue does not have a timing belt. It has a timing chain.
If the timing belt is broken the vehicle will not start.
Give more info., did previous timing belt fail?
Remove the timing belt cover and inspect the belt or change it every 90K miles.
If you can drive the car, the timing belt isn't broken. An engine will not start or run with a broken cam belt.
The timing belt should be replaced every 100,000 miles.
The 4 cylinder has a timing belt. I don't know about the 6 cylinders.
2.7 has chain, 3.4 (6cyl.) has belt
The Chevy 350 does not have a timing belt, It has a timing chain. If you are wanting to know where to set the timing, then I need to know the year of the engine. Thay are all different.