It wasn't just the weight, but also mostly the stress of the steering action pushing and pulling the pittman arm / spindle arm. I definitely underestimated the stress on the steering assembly.

No, I don't have any plans. If I did, you would be welcome to them. Except for a handful of T-bucket frames, most of the 20 or so frames I have built or helped build over the years have been one-of-a-kind, plan-as-I-go ventures. I have some sketches that I have made on graph paper to calculate some angles, etc. but no complete plans. I generally do a full-size layout on the garage floor using 2" masking tape and an assortment of measuring tools. If you look in my gallery of build pics on my coupe, there are a couple of pictures of the layout on the floor and some frame pieces cut to fit it.

The most complex frame I ever built was for a '48 Anglia. It had an independent front end out of an MG Midget and a narrowed 12-bolt Chevy rear on crossed torsion bars. After that would probably be the frame I built for a '37 Chevy coupe. Probably the prettiest frame I ever built is the Deuce-style frame under my coupe. The jury is still out on my roadster frame; it is the only one I have ever done completely from round tubing. It may be the most interesting (from a builder's standpoint).

If I can be of assistance to you on your build, please let me know. What type of frame are you planning? What kind of car?