Isn’t a 1986 Z28 Camaro either TPI or the LT1 350?
In any case, new battery, drain all the fluids/fuel, new fluids/filters, fresh fuel(maybe the fuel pump is OK if it’s electric). Then pull the distributor, use a priming tool with a drill to prime the oil circuits to avoid a dry start. The factory spark plugs should be OK but new wires and cap/rotor wouldn’t hurt - GM still sells them as ACDelco OE or Professional.
In any case, new battery, drain all the fluids/fuel, new fluids/filters, fresh fuel(maybe the fuel pump is OK if it’s electric). Then pull the distributor, use a priming tool with a drill to prime the oil circuits to avoid a dry start. The factory spark plugs should be OK but new wires and cap/rotor wouldn’t hurt - GM still sells them as ACDelco OE or Professional.