Quote:
Originally Posted by Coasttocoast
No rust underneath and so it looks my tabs are in good shape.
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It isn't rust, but metal fatigue. Essentially the engine is too heavy for the load put on the control arm mounts, so they separate from & crack at the tabs where the control arm mounts meet the subframe. Sometimes the holes open themselves. Since you plan on having about double the horsepower and a few extra pounds of engine, I would absolutely add the gussets to your subframe to prevent this.