This is information that you will need to verify that each frame dimension is correct on your 1978 Pontiac Firebird.  The diagram shown on the auction is a sample of what the frame diagram looks like that I will be sending you for your car.Whether you are doing a frame off restoration, replacing rusted out body mounts, correcting your front end alignment  or just trying to align the doors on your car this information is invaluable. Should the unthinkable happen and your car is in a serious accident you will have all the information that you need to repair it back to the NOS dimensions. The numbers have been erased on the images shown on the auction, what I will send you is a copy of the diagram with all the numbers listed that is enlarged to an easy to read 11 X 17 sheet of paper. Also included with this purchase are the wheel alignment specs for your car along with a page of helps and instructions to assist you in interpreting the measurements on the diagram and correctly making these measurements on your car. This information is shown enlarged on a double side printed 11 X 17 sheet of paper. These sheets are folded twice and mailed in a 6 x 9 envelope via 1^st Class Mail. Some customers have requested that I send their sheets rolled up in a mailing tube so they are suitable for framing. I can do this for an additional $13.00 shipping. If you are interested on this service please send me a question with your zip code to get more information. I can also scan and e-mail this information to you if you need it in a hurry.78BH-52,78BH-56, 78BH-57A