I was just going to change my timing set, but once I tore it apart I decided to convert my truck to serpentine. 
These are off of a 6.2l diesel, but some parts interchange with gassers.
Anyway, I have the following V-belt (standard rotation) parts available:
-NEW (never bolted to engine) water pump installed on cleaned original backing plate, Autozone part number DWP-598. ONLY fits GM diesels with V-belts (standard rotation). $50 + shipping.
-Alternator, used for 6 months prior to project. Still in very good condition. Autozone part number DL7273-12. Also fits gassers. $50 + shipping.
-Power steering pump, used for 6 months prior to project. Still in very good condition. I installed the pump when new (Autozone part number 7272) into the original reservoir. Comes with pulley. $30 = shipping.
-Water crossover with thermostat. Only fits GM diesels with V-belts. $20 + shipping.
-6-blade steel fan with Hayden Severe Duty fan clutch (clutch is 3 years old). $20 + shipping.
-Crank pulley, fan pulley, and brackets. Free + shipping.
OR do me a favor and take the whole goshdang pile of everything for $100 + shipping. If it's not all gone in a couple weeks it'll likely just go to the scrapyard - I have no vehicles left that this stuff will fit.
It's in Ridgecrest, CA.

These are off of a 6.2l diesel, but some parts interchange with gassers.
Anyway, I have the following V-belt (standard rotation) parts available:
-NEW (never bolted to engine) water pump installed on cleaned original backing plate, Autozone part number DWP-598. ONLY fits GM diesels with V-belts (standard rotation). $50 + shipping.
-Alternator, used for 6 months prior to project. Still in very good condition. Autozone part number DL7273-12. Also fits gassers. $50 + shipping.
-Power steering pump, used for 6 months prior to project. Still in very good condition. I installed the pump when new (Autozone part number 7272) into the original reservoir. Comes with pulley. $30 = shipping.
-Water crossover with thermostat. Only fits GM diesels with V-belts. $20 + shipping.
-6-blade steel fan with Hayden Severe Duty fan clutch (clutch is 3 years old). $20 + shipping.
-Crank pulley, fan pulley, and brackets. Free + shipping.
OR do me a favor and take the whole goshdang pile of everything for $100 + shipping. If it's not all gone in a couple weeks it'll likely just go to the scrapyard - I have no vehicles left that this stuff will fit.
It's in Ridgecrest, CA.