I have a brand new Fidanza aluminum flywheel for an LS1 for sale. It should fit any Gen III small block (up to 05.)
The specs are as follows: (stolen from Summit Racing)
| Brand | Fidanza |
| Manufacturer’s Part Number | 198571 |
| Part Type | Flywheels |
| Product Line | Fidanza Billet Aluminum Flywheels |
| Summit Racing Part Number | FIZ-198571 |
| Ring Gear Tooth Quantity | 168-tooth |
| Rear Main Seal Style | 1-piece |
| Flywheel Material | Billet aluminum |
| Engine Balance | Internal |
| Weight | 12.500 lbs. |
| Replaceable Friction Surface | Yes |
| Safety Rating | SFI 1.1 |
| Quantity | Sold individually. |
$300 price does not include shipping.