This is the information that you will need to verify that the frame is correct on your 1955 1956 1957 1958 and 1959 Chevy trucks. The diagram that I have is labeled 1958, I am listing it for 1955-59 as the frame was the same on Chevy and GMC trucks for all those years. The same basic frame design was used for all the Chevy trucks including models 3200, 3600, 3400, 3500, 3700, 3800, 4100, 6100, 6300, 4400, 6400, 4500, 5100, 5300, 5400, 5700, 6200, 6600, 6500, 6700, 6800, 7100, 9100, 7200, 9200, 7700, 9700, 8100, 10100, 8200, 10200, 8400, 10400, 8500, 10500, 8700, 10700, and 8800.  I have added a second diagram that is not shown on this auction that has many additional dimensions listed on it. 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 truck this information is invaluable. Should the unthinkable happen and your pick up 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 truck, that page is not shown on the auction. I have these frame dimensions available for most cars and trucks from 1938-1980, if there is something else you are looking for just let me know and if I have it available I will put it on auction for you.  bdypg trk 1, trk 2