Replaces factory engine mount for 75-81 F-Body
Extra Bolt holes will adapt a 61-69 2 bolt block to use in 70-81 F-body
For 75-81- Works as a factory replacement engine mount
Excludes 403
These may require some modification or slight shifting of frame mounts for proper alignment. Both because of thickness of required adapter and/or "tweaks" in the frame over years of use, damage, etc