Here is how you verify your engine is the correct engine for your 68 Firebird.
1. Order your PMS docs from PHS-Online.com
2, On the "Car Billing History" you will see the VEHICLE IDENTIFICATION NO. (VIN) in upper right hand corner. Within the VIN no. is the "SERIAL NO.". This no. represents the sequential no. assigned by Pontiac. You use this no. to verify you have the correct body for your car. This no. is stamped on top of the Upper Cowl panel. It is also stamped on the cowl under the heater fan. These are the HIDDEN VIN's
3. In the center of the page you will see the "ENGINE UNIT NO." This no. corresponds to the number stamped on the block under the 2 letter code (engine code) on the RH side of the water pump on the block.
4. Typically you can determine what engine you have fairly quickly. Read off the 2 letter code off the block and read the code off the center manifold head. Go to Wallace Engineering and query the engine & head codes:
