FRAME difference


Bought a 87GN to find its a WE4.
Feb 10, 2019
What is the difference between an 87 Regal (non-turbo) Frame and a 87 GN-Turbo T Frame? I've been told there is a difference between the two but not sure where. Reason being, looking to pick up a frame to restore for my Turbo-T and the frame i'd like to purchase is from an 87 Regal Non-Turbo car .
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I think the frames are the same. Subscribed to see others thoughts.
IIRC, it has been awhile, but the TB frame has an additional/larger rear cross-member brace. This is the area directly above the rear wheels where the upper trailing arms mount.