Is a 1992 Chevy Sprint or Metro 3 cylinder engine a clearance engine and would the valves be damaged in the event of a timing belt failure?

I suffered a timing belt failure in a 3 cylinder 91 Chevy sprint, doing about 120 kilometers per hour(about 70 mph), with no damage to the engine. The engine end bearing seals were starting to leak, spraying oil on the belt, causing very premature failure... after a replaced belt, and seals, I've put on another 15,000 kilometers, and the car still goes :)

such a failure is bound to damage the engine.or something important.