the 3.6 ohc motor is the same. timing chain is terrible design. they use the standard link belt style chain from the crank to an idler(were the old mid engine camshaft used to be) and then from that idler a chain roller type to each over head cam drive gear sohc/dohc. Same concept. tsb's for engine rattle. timing tensioner. crank no start. broken upper chain. rough idle cam crank sync codes. lower chain stretch. they just suck.
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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