That looks great. Good idea. The vendors will probably switch to that idea so there is no welding. Do they say anything about putting a plate on the frame rail to prevent cracking? Some factory power steering setups with Saginaw boxes have cracked the frame and they sell a stiffener. Don't know if that is true with AD. If that tab ever wants to "rotate" for some reason, you can make the angle longer and catch that existing bolt toward front.
You may want to round the corners on that angle iron tab to make it look better and of course paint black. Is it aluminum or steel?

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