I believe 88 and earlier 305's have a nylon coated cam gear that is supposed to make them run quieter but are prone to failure, however chain and crank gear are all steel.
It has a timing chain.
it has a timing chain it has a timing chain
It has a Timing Chain.
Chain
Every typical "V" style engine has a timing chain. the Chevy cavalier z24 has a 3.1 liter FI V6 engine. so yes it has a timing chain.
The 4.3 liter V6 engine in a 1997 Chevy Blazer has a timing CHAIN
It has timing chain and gears. NO belt.
how much play should a 4.3 Chevy engine timing chain have?
Chain
The timing chain is designed to last the life of the engine.
chain
That engine has a timing chain and gears and will probley out last the engine. NO need to replace it.