Frames

[Angel]

I need to know if the frames are the same for a 57 chevy 2dr. hrdtp and 4dr sedan.Anyone online now that know I would appreciate knowing as soon as posible.

[reborn55]

yes they are as far as I know

[MikeKy55]

The hardtop frame will have one additional body mount bracket on the inboard side of the rail right at the B-pillar. If your using the hardtop frame on the sedan, just remove that bracket. If you putting a sedan frame under a hardtop, switch the bracket fron the hardtop frame to the sedan frame.

[Angel]

I don't want to sound dense,but what is the B Pillar

[MikeKy55]

The point where the door meets the quarter panel.

[allengator]

what about the wagons (2dr and 4dr) and the sedan delivery??
Interchangable with each other??

Interchangable with the sedan or others??

How interchangable are the three different years??

[warpwr]

’55 & 56 frames are identical except they have different rear spring hangers. ’56 has a small gusset welded into the rear box portion on each side.
’57 frames have different front horns for the bumper mount. I don’t know about the rear spring hangers.
Convertible frames have an x-member welded into the middle for stability.
Hardtops have the extra support as noted.
Some frames are ‘one-piece’ and some have welded seams but are identical mechanically.

A ’56 2 door will fit on a ’55 frame for a four door, etc. All years and styles have the exact same wheelbase. 115 inches.