On this topic, has anyone used the 73 frame brackets with the 71-2 mounts to purposely lower the engine the said 1". I wonder if the oil pan would be too close to the cross member, and then you will have to find a way to lower the fan shroud. This will be a good idea for those installing a TKO. In my case I have it with the engine at stock height and since I didn't modify the tunnel, the drivetrain sits at a steeper angle (about +2 degrees). Not a big deal if you match the angle back in the differential, but lowering the engine should help with angles and lowering the center of gravity. However, one downside I don't like is that the headers will be scraping more often. Even worst when I lower my front end with the future planned suspension upgrade.