any downside to going with rectangular tubing over round? ...other than it will be ugly? it looks the only thing it will effect is the notch on my spring perch.
I'll silence the crickets. I didn't use rectangular for my crossmember, but I did use 2.5" X 2.5" .25" wall thickness square tubing. Worked fine, and looks a little less like a "kit" frame than with a round tube. Bob
Round tube would allow you to weld in the xmember and then tweak the angle of the spring perch without having to change the shape of the notch.
If you are talking T buckets, then that has been the style. Nothing is carved in stone. I followed along with the Joe Mayall T frame articles in Rod Action about 30 years ago and built a 3X2 box tubing frame for my 26 roadster. (anybody else build one from that series of articles?) He gave detailed blueprints for building a T frame out of 2X3 box tubing. The front cross member had a small drop in it. It was designed to be a full fender frame. I want to say it was 1978? Good reading if you want to build a tubing frame with ideas for body mounts and cross members.
Ihave the complete artical. send me a snail mail and i,ll send you a copy. also fax would work dirt t
There are even old articles using 2X3 or 2X4 channel for the frame of a T roadster. I once went to look at a car project for sale and it had a channel frame. The guy was using that article to build his car. I passed but it has been done.