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This may have already been ask,,but I just joined today,Jan 25 2018,,my question ,,I have found a 57 Chevrolet frame with a Corvette c4 suspension already installed with rack and pinion factory rear transverse leaf springs and coil over and C4 front cradle,boxed frame..my question is will it BOLT in to my 55 210 2 dr sedan,,the frame is for a 1957 Wagon, I don't want to start cutting and welding the frame since it is finished and painted,,thanks for any help,
The wagon frames are identical to the sedan frames, whether 2 door or 4 door, within a given year of car. 55 and 56 are the same, however....the front frame horns on a 57 are about 2" shorter than a 55 or 56 and the bumper bolt holes are in a different location. So if they designed the front frame horns for a 57 in the C4 conversion, they will be shorter. In the rear the bumper bolt holes are also slightly different with the rearmost one being 1/2" further forward than a 55 or 56. Everything else should be the same from a 57 to a 55. If you are willing to make custom bumper mount brackets you should be able to use the frame.
Do you have a pic of the frame?
I just remembered one more small difference between 55/6 frames and 57. On a 55/56 there is a small tab just below the cowl body mount to attach the inner fender lower section to, which is not present on a 57 frame. It's not a big deal because you could bolt a small tab there to use the frame on a 55.